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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/11/15 14:54:55 UTC
[13/51] [partial] hbase-site git commit: Published site at
130057f13774f6b213cdb06952c805a29d59396e.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/68eae623/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.RestoreMetaChanges.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.RestoreMetaChanges.html b/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.RestoreMetaChanges.html
index cbae28e..aec5920 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.RestoreMetaChanges.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/snapshot/RestoreSnapshotHelper.RestoreMetaChanges.html
@@ -64,825 +64,827 @@
<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;<a name="line.56"></a>
<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.57"></a>
<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.security.access.AccessControlClient;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.security.access.ShadedAccessControlUtil;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.security.access.TablePermission;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.util.ModifyRegionUtils;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import org.apache.hadoop.io.IOUtils;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import org.slf4j.Logger;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import org.slf4j.LoggerFactory;<a name="line.68"></a>
-<span class="sourceLineNo">069</span>import org.apache.hbase.thirdparty.com.google.common.collect.ListMultimap;<a name="line.69"></a>
-<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.72"></a>
-<span class="sourceLineNo">073</span><a name="line.73"></a>
-<span class="sourceLineNo">074</span>/**<a name="line.74"></a>
-<span class="sourceLineNo">075</span> * Helper to Restore/Clone a Snapshot<a name="line.75"></a>
-<span class="sourceLineNo">076</span> *<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * <p>The helper assumes that a table is already created, and by calling restore()<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * the content present in the snapshot will be restored as the new content of the table.<a name="line.78"></a>
-<span class="sourceLineNo">079</span> *<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * <p>Clone from Snapshot: If the target table is empty, the restore operation<a name="line.80"></a>
-<span class="sourceLineNo">081</span> * is just a "clone operation", where the only operations are:<a name="line.81"></a>
-<span class="sourceLineNo">082</span> * <ul><a name="line.82"></a>
-<span class="sourceLineNo">083</span> * <li>for each region in the snapshot create a new region<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * (note that the region will have a different name, since the encoding contains the table name)<a name="line.84"></a>
-<span class="sourceLineNo">085</span> * <li>for each file in the region create a new HFileLink to point to the original file.<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * <li>restore the logs, if any<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * </ul><a name="line.87"></a>
-<span class="sourceLineNo">088</span> *<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * <p>Restore from Snapshot:<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * <ul><a name="line.90"></a>
-<span class="sourceLineNo">091</span> * <li>for each region in the table verify which are available in the snapshot and which are not<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * <ul><a name="line.92"></a>
-<span class="sourceLineNo">093</span> * <li>if the region is not present in the snapshot, remove it.<a name="line.93"></a>
-<span class="sourceLineNo">094</span> * <li>if the region is present in the snapshot<a name="line.94"></a>
-<span class="sourceLineNo">095</span> * <ul><a name="line.95"></a>
-<span class="sourceLineNo">096</span> * <li>for each file in the table region verify which are available in the snapshot<a name="line.96"></a>
-<span class="sourceLineNo">097</span> * <ul><a name="line.97"></a>
-<span class="sourceLineNo">098</span> * <li>if the hfile is not present in the snapshot, remove it<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * <li>if the hfile is present, keep it (nothing to do)<a name="line.99"></a>
-<span class="sourceLineNo">100</span> * </ul><a name="line.100"></a>
-<span class="sourceLineNo">101</span> * <li>for each file in the snapshot region but not in the table<a name="line.101"></a>
-<span class="sourceLineNo">102</span> * <ul><a name="line.102"></a>
-<span class="sourceLineNo">103</span> * <li>create a new HFileLink that point to the original file<a name="line.103"></a>
-<span class="sourceLineNo">104</span> * </ul><a name="line.104"></a>
-<span class="sourceLineNo">105</span> * </ul><a name="line.105"></a>
-<span class="sourceLineNo">106</span> * </ul><a name="line.106"></a>
-<span class="sourceLineNo">107</span> * <li>for each region in the snapshot not present in the current table state<a name="line.107"></a>
-<span class="sourceLineNo">108</span> * <ul><a name="line.108"></a>
-<span class="sourceLineNo">109</span> * <li>create a new region and for each file in the region create a new HFileLink<a name="line.109"></a>
-<span class="sourceLineNo">110</span> * (This is the same as the clone operation)<a name="line.110"></a>
-<span class="sourceLineNo">111</span> * </ul><a name="line.111"></a>
-<span class="sourceLineNo">112</span> * <li>restore the logs, if any<a name="line.112"></a>
-<span class="sourceLineNo">113</span> * </ul><a name="line.113"></a>
-<span class="sourceLineNo">114</span> */<a name="line.114"></a>
-<span class="sourceLineNo">115</span>@InterfaceAudience.Private<a name="line.115"></a>
-<span class="sourceLineNo">116</span>public class RestoreSnapshotHelper {<a name="line.116"></a>
-<span class="sourceLineNo">117</span> private static final Logger LOG = LoggerFactory.getLogger(RestoreSnapshotHelper.class);<a name="line.117"></a>
-<span class="sourceLineNo">118</span><a name="line.118"></a>
-<span class="sourceLineNo">119</span> private final Map<byte[], byte[]> regionsMap = new TreeMap<>(Bytes.BYTES_COMPARATOR);<a name="line.119"></a>
-<span class="sourceLineNo">120</span><a name="line.120"></a>
-<span class="sourceLineNo">121</span> private final Map<String, Pair<String, String> > parentsMap = new HashMap<>();<a name="line.121"></a>
-<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span> private final ForeignExceptionDispatcher monitor;<a name="line.123"></a>
-<span class="sourceLineNo">124</span> private final MonitoredTask status;<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> private final SnapshotManifest snapshotManifest;<a name="line.126"></a>
-<span class="sourceLineNo">127</span> private final SnapshotDescription snapshotDesc;<a name="line.127"></a>
-<span class="sourceLineNo">128</span> private final TableName snapshotTable;<a name="line.128"></a>
-<span class="sourceLineNo">129</span><a name="line.129"></a>
-<span class="sourceLineNo">130</span> private final TableDescriptor tableDesc;<a name="line.130"></a>
-<span class="sourceLineNo">131</span> private final Path rootDir;<a name="line.131"></a>
-<span class="sourceLineNo">132</span> private final Path tableDir;<a name="line.132"></a>
-<span class="sourceLineNo">133</span><a name="line.133"></a>
-<span class="sourceLineNo">134</span> private final Configuration conf;<a name="line.134"></a>
-<span class="sourceLineNo">135</span> private final FileSystem fs;<a name="line.135"></a>
-<span class="sourceLineNo">136</span> private final boolean createBackRefs;<a name="line.136"></a>
-<span class="sourceLineNo">137</span><a name="line.137"></a>
-<span class="sourceLineNo">138</span> public RestoreSnapshotHelper(final Configuration conf,<a name="line.138"></a>
-<span class="sourceLineNo">139</span> final FileSystem fs,<a name="line.139"></a>
-<span class="sourceLineNo">140</span> final SnapshotManifest manifest,<a name="line.140"></a>
-<span class="sourceLineNo">141</span> final TableDescriptor tableDescriptor,<a name="line.141"></a>
-<span class="sourceLineNo">142</span> final Path rootDir,<a name="line.142"></a>
-<span class="sourceLineNo">143</span> final ForeignExceptionDispatcher monitor,<a name="line.143"></a>
-<span class="sourceLineNo">144</span> final MonitoredTask status) {<a name="line.144"></a>
-<span class="sourceLineNo">145</span> this(conf, fs, manifest, tableDescriptor, rootDir, monitor, status, true);<a name="line.145"></a>
-<span class="sourceLineNo">146</span> }<a name="line.146"></a>
-<span class="sourceLineNo">147</span><a name="line.147"></a>
-<span class="sourceLineNo">148</span> public RestoreSnapshotHelper(final Configuration conf,<a name="line.148"></a>
-<span class="sourceLineNo">149</span> final FileSystem fs,<a name="line.149"></a>
-<span class="sourceLineNo">150</span> final SnapshotManifest manifest,<a name="line.150"></a>
-<span class="sourceLineNo">151</span> final TableDescriptor tableDescriptor,<a name="line.151"></a>
-<span class="sourceLineNo">152</span> final Path rootDir,<a name="line.152"></a>
-<span class="sourceLineNo">153</span> final ForeignExceptionDispatcher monitor,<a name="line.153"></a>
-<span class="sourceLineNo">154</span> final MonitoredTask status,<a name="line.154"></a>
-<span class="sourceLineNo">155</span> final boolean createBackRefs)<a name="line.155"></a>
-<span class="sourceLineNo">156</span> {<a name="line.156"></a>
-<span class="sourceLineNo">157</span> this.fs = fs;<a name="line.157"></a>
-<span class="sourceLineNo">158</span> this.conf = conf;<a name="line.158"></a>
-<span class="sourceLineNo">159</span> this.snapshotManifest = manifest;<a name="line.159"></a>
-<span class="sourceLineNo">160</span> this.snapshotDesc = manifest.getSnapshotDescription();<a name="line.160"></a>
-<span class="sourceLineNo">161</span> this.snapshotTable = TableName.valueOf(snapshotDesc.getTable());<a name="line.161"></a>
-<span class="sourceLineNo">162</span> this.tableDesc = tableDescriptor;<a name="line.162"></a>
-<span class="sourceLineNo">163</span> this.rootDir = rootDir;<a name="line.163"></a>
-<span class="sourceLineNo">164</span> this.tableDir = FSUtils.getTableDir(rootDir, tableDesc.getTableName());<a name="line.164"></a>
-<span class="sourceLineNo">165</span> this.monitor = monitor;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> this.status = status;<a name="line.166"></a>
-<span class="sourceLineNo">167</span> this.createBackRefs = createBackRefs;<a name="line.167"></a>
-<span class="sourceLineNo">168</span> }<a name="line.168"></a>
-<span class="sourceLineNo">169</span><a name="line.169"></a>
-<span class="sourceLineNo">170</span> /**<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * Restore the on-disk table to a specified snapshot state.<a name="line.171"></a>
-<span class="sourceLineNo">172</span> * @return the set of regions touched by the restore operation<a name="line.172"></a>
-<span class="sourceLineNo">173</span> */<a name="line.173"></a>
-<span class="sourceLineNo">174</span> public RestoreMetaChanges restoreHdfsRegions() throws IOException {<a name="line.174"></a>
-<span class="sourceLineNo">175</span> ThreadPoolExecutor exec = SnapshotManifest.createExecutor(conf, "RestoreSnapshot");<a name="line.175"></a>
-<span class="sourceLineNo">176</span> try {<a name="line.176"></a>
-<span class="sourceLineNo">177</span> return restoreHdfsRegions(exec);<a name="line.177"></a>
-<span class="sourceLineNo">178</span> } finally {<a name="line.178"></a>
-<span class="sourceLineNo">179</span> exec.shutdown();<a name="line.179"></a>
-<span class="sourceLineNo">180</span> }<a name="line.180"></a>
-<span class="sourceLineNo">181</span> }<a name="line.181"></a>
-<span class="sourceLineNo">182</span><a name="line.182"></a>
-<span class="sourceLineNo">183</span> private RestoreMetaChanges restoreHdfsRegions(final ThreadPoolExecutor exec) throws IOException {<a name="line.183"></a>
-<span class="sourceLineNo">184</span> LOG.info("starting restore table regions using snapshot=" + snapshotDesc);<a name="line.184"></a>
-<span class="sourceLineNo">185</span><a name="line.185"></a>
-<span class="sourceLineNo">186</span> Map<String, SnapshotRegionManifest> regionManifests = snapshotManifest.getRegionManifestsMap();<a name="line.186"></a>
-<span class="sourceLineNo">187</span> if (regionManifests == null) {<a name="line.187"></a>
-<span class="sourceLineNo">188</span> LOG.warn("Nothing to restore. Snapshot " + snapshotDesc + " looks empty");<a name="line.188"></a>
-<span class="sourceLineNo">189</span> return null;<a name="line.189"></a>
-<span class="sourceLineNo">190</span> }<a name="line.190"></a>
-<span class="sourceLineNo">191</span><a name="line.191"></a>
-<span class="sourceLineNo">192</span> RestoreMetaChanges metaChanges = new RestoreMetaChanges(tableDesc, parentsMap);<a name="line.192"></a>
-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span> // Take a copy of the manifest.keySet() since we are going to modify<a name="line.194"></a>
-<span class="sourceLineNo">195</span> // this instance, by removing the regions already present in the restore dir.<a name="line.195"></a>
-<span class="sourceLineNo">196</span> Set<String> regionNames = new HashSet<>(regionManifests.keySet());<a name="line.196"></a>
-<span class="sourceLineNo">197</span><a name="line.197"></a>
-<span class="sourceLineNo">198</span> List<RegionInfo> tableRegions = getTableRegions();<a name="line.198"></a>
-<span class="sourceLineNo">199</span><a name="line.199"></a>
-<span class="sourceLineNo">200</span> RegionInfo mobRegion = MobUtils.getMobRegionInfo(snapshotManifest.getTableDescriptor()<a name="line.200"></a>
-<span class="sourceLineNo">201</span> .getTableName());<a name="line.201"></a>
-<span class="sourceLineNo">202</span> if (tableRegions != null) {<a name="line.202"></a>
-<span class="sourceLineNo">203</span> // restore the mob region in case<a name="line.203"></a>
-<span class="sourceLineNo">204</span> if (regionNames.contains(mobRegion.getEncodedName())) {<a name="line.204"></a>
-<span class="sourceLineNo">205</span> monitor.rethrowException();<a name="line.205"></a>
-<span class="sourceLineNo">206</span> status.setStatus("Restoring mob region...");<a name="line.206"></a>
-<span class="sourceLineNo">207</span> List<RegionInfo> mobRegions = new ArrayList<>(1);<a name="line.207"></a>
-<span class="sourceLineNo">208</span> mobRegions.add(mobRegion);<a name="line.208"></a>
-<span class="sourceLineNo">209</span> restoreHdfsMobRegions(exec, regionManifests, mobRegions);<a name="line.209"></a>
-<span class="sourceLineNo">210</span> regionNames.remove(mobRegion.getEncodedName());<a name="line.210"></a>
-<span class="sourceLineNo">211</span> status.setStatus("Finished restoring mob region.");<a name="line.211"></a>
-<span class="sourceLineNo">212</span> }<a name="line.212"></a>
-<span class="sourceLineNo">213</span> }<a name="line.213"></a>
-<span class="sourceLineNo">214</span> if (regionNames.contains(mobRegion.getEncodedName())) {<a name="line.214"></a>
-<span class="sourceLineNo">215</span> // add the mob region<a name="line.215"></a>
-<span class="sourceLineNo">216</span> monitor.rethrowException();<a name="line.216"></a>
-<span class="sourceLineNo">217</span> status.setStatus("Cloning mob region...");<a name="line.217"></a>
-<span class="sourceLineNo">218</span> cloneHdfsMobRegion(regionManifests, mobRegion);<a name="line.218"></a>
-<span class="sourceLineNo">219</span> regionNames.remove(mobRegion.getEncodedName());<a name="line.219"></a>
-<span class="sourceLineNo">220</span> status.setStatus("Finished cloning mob region.");<a name="line.220"></a>
-<span class="sourceLineNo">221</span> }<a name="line.221"></a>
-<span class="sourceLineNo">222</span><a name="line.222"></a>
-<span class="sourceLineNo">223</span> // Identify which region are still available and which not.<a name="line.223"></a>
-<span class="sourceLineNo">224</span> // NOTE: we rely upon the region name as: "table name, start key, end key"<a name="line.224"></a>
-<span class="sourceLineNo">225</span> if (tableRegions != null) {<a name="line.225"></a>
-<span class="sourceLineNo">226</span> monitor.rethrowException();<a name="line.226"></a>
-<span class="sourceLineNo">227</span> for (RegionInfo regionInfo: tableRegions) {<a name="line.227"></a>
-<span class="sourceLineNo">228</span> String regionName = regionInfo.getEncodedName();<a name="line.228"></a>
-<span class="sourceLineNo">229</span> if (regionNames.contains(regionName)) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> LOG.info("region to restore: " + regionName);<a name="line.230"></a>
-<span class="sourceLineNo">231</span> regionNames.remove(regionName);<a name="line.231"></a>
-<span class="sourceLineNo">232</span> metaChanges.addRegionToRestore(ProtobufUtil.toRegionInfo(regionManifests.get(regionName)<a name="line.232"></a>
-<span class="sourceLineNo">233</span> .getRegionInfo()));<a name="line.233"></a>
-<span class="sourceLineNo">234</span> } else {<a name="line.234"></a>
-<span class="sourceLineNo">235</span> LOG.info("region to remove: " + regionName);<a name="line.235"></a>
-<span class="sourceLineNo">236</span> metaChanges.addRegionToRemove(regionInfo);<a name="line.236"></a>
-<span class="sourceLineNo">237</span> }<a name="line.237"></a>
-<span class="sourceLineNo">238</span> }<a name="line.238"></a>
-<span class="sourceLineNo">239</span> }<a name="line.239"></a>
-<span class="sourceLineNo">240</span><a name="line.240"></a>
-<span class="sourceLineNo">241</span> // Regions to Add: present in the snapshot but not in the current table<a name="line.241"></a>
-<span class="sourceLineNo">242</span> List<RegionInfo> regionsToAdd = new ArrayList<>(regionNames.size());<a name="line.242"></a>
-<span class="sourceLineNo">243</span> if (regionNames.size() > 0) {<a name="line.243"></a>
-<span class="sourceLineNo">244</span> monitor.rethrowException();<a name="line.244"></a>
-<span class="sourceLineNo">245</span> for (String regionName: regionNames) {<a name="line.245"></a>
-<span class="sourceLineNo">246</span> LOG.info("region to add: " + regionName);<a name="line.246"></a>
-<span class="sourceLineNo">247</span> regionsToAdd.add(ProtobufUtil.toRegionInfo(regionManifests.get(regionName)<a name="line.247"></a>
-<span class="sourceLineNo">248</span> .getRegionInfo()));<a name="line.248"></a>
-<span class="sourceLineNo">249</span> }<a name="line.249"></a>
-<span class="sourceLineNo">250</span> }<a name="line.250"></a>
-<span class="sourceLineNo">251</span><a name="line.251"></a>
-<span class="sourceLineNo">252</span> // Create new regions cloning from the snapshot<a name="line.252"></a>
-<span class="sourceLineNo">253</span> // HBASE-19980: We need to call cloneHdfsRegions() before restoreHdfsRegions() because<a name="line.253"></a>
-<span class="sourceLineNo">254</span> // regionsMap is constructed in cloneHdfsRegions() and it can be used in restoreHdfsRegions().<a name="line.254"></a>
-<span class="sourceLineNo">255</span> monitor.rethrowException();<a name="line.255"></a>
-<span class="sourceLineNo">256</span> status.setStatus("Cloning regions...");<a name="line.256"></a>
-<span class="sourceLineNo">257</span> RegionInfo[] clonedRegions = cloneHdfsRegions(exec, regionManifests, regionsToAdd);<a name="line.257"></a>
-<span class="sourceLineNo">258</span> metaChanges.setNewRegions(clonedRegions);<a name="line.258"></a>
-<span class="sourceLineNo">259</span> status.setStatus("Finished cloning regions.");<a name="line.259"></a>
-<span class="sourceLineNo">260</span><a name="line.260"></a>
-<span class="sourceLineNo">261</span> // Restore regions using the snapshot data<a name="line.261"></a>
-<span class="sourceLineNo">262</span> monitor.rethrowException();<a name="line.262"></a>
-<span class="sourceLineNo">263</span> status.setStatus("Restoring table regions...");<a name="line.263"></a>
-<span class="sourceLineNo">264</span> restoreHdfsRegions(exec, regionManifests, metaChanges.getRegionsToRestore());<a name="line.264"></a>
-<span class="sourceLineNo">265</span> status.setStatus("Finished restoring all table regions.");<a name="line.265"></a>
-<span class="sourceLineNo">266</span><a name="line.266"></a>
-<span class="sourceLineNo">267</span> // Remove regions from the current table<a name="line.267"></a>
-<span class="sourceLineNo">268</span> monitor.rethrowException();<a name="line.268"></a>
-<span class="sourceLineNo">269</span> status.setStatus("Starting to delete excess regions from table");<a name="line.269"></a>
-<span class="sourceLineNo">270</span> removeHdfsRegions(exec, metaChanges.getRegionsToRemove());<a name="line.270"></a>
-<span class="sourceLineNo">271</span> status.setStatus("Finished deleting excess regions from table.");<a name="line.271"></a>
-<span class="sourceLineNo">272</span><a name="line.272"></a>
-<span class="sourceLineNo">273</span> LOG.info("finishing restore table regions using snapshot=" + snapshotDesc);<a name="line.273"></a>
-<span class="sourceLineNo">274</span><a name="line.274"></a>
-<span class="sourceLineNo">275</span> return metaChanges;<a name="line.275"></a>
-<span class="sourceLineNo">276</span> }<a name="line.276"></a>
-<span class="sourceLineNo">277</span><a name="line.277"></a>
-<span class="sourceLineNo">278</span> /**<a name="line.278"></a>
-<span class="sourceLineNo">279</span> * Describe the set of operations needed to update hbase:meta after restore.<a name="line.279"></a>
-<span class="sourceLineNo">280</span> */<a name="line.280"></a>
-<span class="sourceLineNo">281</span> public static class RestoreMetaChanges {<a name="line.281"></a>
-<span class="sourceLineNo">282</span> private final Map<String, Pair<String, String> > parentsMap;<a name="line.282"></a>
-<span class="sourceLineNo">283</span> private final TableDescriptor htd;<a name="line.283"></a>
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-<span class="sourceLineNo">763</span> Pair<String, String> daughters = parentsMap.get(clonedRegionName);<a name="line.763"></a>
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-<span class="sourceLineNo">765</span> // In case one side of the split is already compacted, regionName is put as both first and<a name="line.765"></a>
-<span class="sourceLineNo">766</span> // second of Pair<a name="line.766"></a>
-<span class="sourceLineNo">767</span> daughters = new Pair<>(regionName, regionName);<a name="line.767"></a>
-<span class="sourceLineNo">768</span> parentsMap.put(clonedRegionName, daughters);<a name="line.768"></a>
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-<span class="sourceLineNo">775</span> /**<a name="line.775"></a>
-<span class="sourceLineNo">776</span> * Create a new {@link RegionInfo} from the snapshot region info.<a name="line.776"></a>
-<span class="sourceLineNo">777</span> * Keep the same startKey, endKey, regionId and split information but change<a name="line.777"></a>
-<span class="sourceLineNo">778</span> * the table name.<a name="line.778"></a>
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-<span class="sourceLineNo">798</span> * @return the set of the regions contained in the table<a name="line.798"></a>
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-<span class="sourceLineNo">801</span> LOG.debug("get table regions: " + tableDir);<a name="line.801"></a>
-<span class="sourceLineNo">802</span> FileStatus[] regionDirs = FSUtils.listStatus(fs, tableDir, new FSUtils.RegionDirFilter(fs));<a name="line.802"></a>
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-<span class="sourceLineNo">807</span> RegionInfo hri = HRegionFileSystem.loadRegionInfoFileContent(fs, regionDirs[i].getPath());<a name="line.807"></a>
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-<span class="sourceLineNo">810</span> LOG.debug("found " + regions.size() + " regions for table=" +<a name="line.810"></a>
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-<span class="sourceLineNo">816</span> * Copy the snapshot files for a snapshot scanner, discards meta changes.<a name="line.816"></a>
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-<span class="sourceLineNo">825</span> Path rootDir, Path restoreDir, String snapshotName) throws IOException {<a name="line.825"></a>
-<span class="sourceLineNo">826</span> // ensure that restore dir is not under root dir<a name="line.826"></a>
-<span class="sourceLineNo">827</span> if (!restoreDir.getFileSystem(conf).getUri().equals(rootDir.getFileSystem(conf).getUri())) {<a name="line.827"></a>
-<span class="sourceLineNo">828</span> throw new IllegalArgumentException("Filesystems for restore directory and HBase root " +<a name="line.828"></a>
-<span class="sourceLineNo">829</span> "directory should be the same");<a name="line.829"></a>
-<span class="sourceLineNo">830</span> }<a name="line.830"></a>
-<span class="sourceLineNo">831</span> if (restoreDir.toUri().getPath().startsWith(rootDir.toUri().getPath())) {<a name="line.831"></a>
-<span class="sourceLineNo">832</span> throw new IllegalArgumentException("Restore directory cannot be a sub directory of HBase " +<a name="line.832"></a>
-<span class="sourceLineNo">833</span> "root directory. RootDir: " + rootDir + ", restoreDir: " + restoreDir);<a name="line.833"></a>
-<span class="sourceLineNo">834</span> }<a name="line.834"></a>
-<span class="sourceLineNo">835</span><a name="line.835"></a>
-<span class="sourceLineNo">836</span> Path snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshotName, rootDir);<a name="line.836"></a>
-<span class="sourceLineNo">837</span> SnapshotDescription snapshotDesc = SnapshotDescriptionUtils.readSnapshotInfo(fs, snapshotDir);<a name="line.837"></a>
-<span class="sourceLineNo">838</span> SnapshotManifest manifest = SnapshotManifest.open(conf, fs, snapshotDir, snapshotDesc);<a name="line.838"></a>
-<span class="sourceLineNo">839</span><a name="line.839"></a>
-<span class="sourceLineNo">840</span> MonitoredTask status = TaskMonitor.get().createStatus(<a name="line.840"></a>
-<span class="sourceLineNo">841</span> "Restoring snapshot '" + snapshotName + "' to directory " + restoreDir);<a name="line.841"></a>
-<span class="sourceLineNo">842</span> ForeignExceptionDispatcher monitor = new ForeignExceptionDispatcher();<a name="line.842"></a>
-<span class="sourceLineNo">843</span><a name="line.843"></a>
-<span class="sourceLineNo">844</span> // we send createBackRefs=false so that restored hfiles do not create back reference links<a name="line.844"></a>
-<span class="sourceLineNo">845</span> // in the base hbase root dir.<a name="line.845"></a>
-<span class="sourceLineNo">846</span> RestoreSnapshotHelper helper = new RestoreSnapshotHelper(conf, fs,<a name="line.846"></a>
-<span class="sourceLineNo">847</span> manifest, manifest.getTableDescriptor(), restoreDir, monitor, status, false);<a name="line.847"></a>
-<span class="sourceLineNo">848</span> RestoreMetaChanges metaChanges = helper.restoreHdfsRegions(); // TODO: parallelize.<a name="line.848"></a>
-<span class="sourceLineNo">849</span><a name="line.849"></a>
-<span class="sourceLineNo">850</span> if (LOG.isDebugEnabled()) {<a name="line.850"></a>
-<span class="sourceLineNo">851</span> LOG.debug("Restored table dir:" + restoreDir);<a name="line.851"></a>
-<span class="sourceLineNo">852</span> FSUtils.logFileSystemState(fs, restoreDir, LOG);<a name="line.852"></a>
-<span class="sourceLineNo">853</span> }<a name="line.853"></a>
-<span class="sourceLineNo">854</span> return metaChanges;<a name="line.854"></a>
-<span class="sourceLineNo">855</span> }<a name="line.855"></a>
-<span class="sourceLineNo">856</span><a name="line.856"></a>
-<span class="sourceLineNo">857</span> public static void restoreSnapshotAcl(SnapshotDescription snapshot, TableName newTableName,<a name="line.857"></a>
-<span class="sourceLineNo">858</span> Configuration conf) throws IOException {<a name="line.858"></a>
-<span class="sourceLineNo">859</span> if (snapshot.hasUsersAndPermissions() && snapshot.getUsersAndPermissions() != null) {<a name="line.859"></a>
-<span class="sourceLineNo">860</span> LOG.info("Restore snapshot acl to table. snapshot: " + snapshot + ", table: " + newTableName);<a name="line.860"></a>
-<span class="sourceLineNo">861</span> ListMultimap<String, TablePermission> perms =<a name="line.861"></a>
-<span class="sourceLineNo">862</span> ShadedAccessControlUtil.toUserTablePermissions(snapshot.getUsersAndPermissions());<a name="line.862"></a>
-<span class="sourceLineNo">863</span> try (Connection conn = ConnectionFactory.createConnection(conf)) {<a name="line.863"></a>
-<span class="sourceLineNo">864</span> for (Entry<String, TablePermission> e : perms.entries()) {<a name="line.864"></a>
-<span class="sourceLineNo">865</span> String user = e.getKey();<a name="line.865"></a>
-<span class="sourceLineNo">866</span> TablePermission perm = e.getValue();<a name="line.866"></a>
-<span class="sourceLineNo">867</span> perm.setTableName(newTableName);<a name="line.867"></a>
-<span class="sourceLineNo">868</span> AccessControlClient.grant(conn, perm.getTableName(), user, perm.getFamily(),<a name="line.868"></a>
-<span class="sourceLineNo">869</span> perm.getQualifier(), perm.getActions());<a name="line.869"></a>
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-<span class="sourceLineNo">872</span> throw new IOException("Grant acl into newly creatd table failed. snapshot: " + snapshot<a name="line.872"></a>
-<span class="sourceLineNo">873</span> + ", table: " + newTableName, e);<a name="line.873"></a>
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-<span class="sourceLineNo">875</span> }<a name="line.875"></a>
-<span class="sourceLineNo">876</span> }<a name="line.876"></a>
-<span class="sourceLineNo">877</span>}<a name="line.877"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.hbase.security.access.Permission;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.hbase.security.access.ShadedAccessControlUtil;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.security.access.TablePermission;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.util.ModifyRegionUtils;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.util.Pair;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>import org.apache.hadoop.io.IOUtils;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.67"></a>
+<span class="sourceLineNo">068</span>import org.slf4j.Logger;<a name="line.68"></a>
+<span class="sourceLineNo">069</span>import org.slf4j.LoggerFactory;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>import org.apache.hbase.thirdparty.com.google.common.collect.ListMultimap;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.72"></a>
+<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.73"></a>
+<span class="sourceLineNo">074</span><a name="line.74"></a>
+<span class="sourceLineNo">075</span>/**<a name="line.75"></a>
+<span class="sourceLineNo">076</span> * Helper to Restore/Clone a Snapshot<a name="line.76"></a>
+<span class="sourceLineNo">077</span> *<a name="line.77"></a>
+<span class="sourceLineNo">078</span> * <p>The helper assumes that a table is already created, and by calling restore()<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * the content present in the snapshot will be restored as the new content of the table.<a name="line.79"></a>
+<span class="sourceLineNo">080</span> *<a name="line.80"></a>
+<span class="sourceLineNo">081</span> * <p>Clone from Snapshot: If the target table is empty, the restore operation<a name="line.81"></a>
+<span class="sourceLineNo">082</span> * is just a "clone operation", where the only operations are:<a name="line.82"></a>
+<span class="sourceLineNo">083</span> * <ul><a name="line.83"></a>
+<span class="sourceLineNo">084</span> * <li>for each region in the snapshot create a new region<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * (note that the region will have a different name, since the encoding contains the table name)<a name="line.85"></a>
+<span class="sourceLineNo">086</span> * <li>for each file in the region create a new HFileLink to point to the original file.<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * <li>restore the logs, if any<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * </ul><a name="line.88"></a>
+<span class="sourceLineNo">089</span> *<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * <p>Restore from Snapshot:<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * <ul><a name="line.91"></a>
+<span class="sourceLineNo">092</span> * <li>for each region in the table verify which are available in the snapshot and which are not<a name="line.92"></a>
+<span class="sourceLineNo">093</span> * <ul><a name="line.93"></a>
+<span class="sourceLineNo">094</span> * <li>if the region is not present in the snapshot, remove it.<a name="line.94"></a>
+<span class="sourceLineNo">095</span> * <li>if the region is present in the snapshot<a name="line.95"></a>
+<span class="sourceLineNo">096</span> * <ul><a name="line.96"></a>
+<span class="sourceLineNo">097</span> * <li>for each file in the table region verify which are available in the snapshot<a name="line.97"></a>
+<span class="sourceLineNo">098</span> * <ul><a name="line.98"></a>
+<span class="sourceLineNo">099</span> * <li>if the hfile is not
<TRUNCATED>