[jira] [Work started] (HBASE-28059) Use correct units in RegionLoad#getStoreUncompressedSizeMB()

["Charles Connell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-28059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-28059 started by Charles Connell.
-----------------------------------------------
> Use correct units in RegionLoad#getStoreUncompressedSizeMB()
> ------------------------------------------------------------
>
>                 Key: HBASE-28059
>                 URL: https://issues.apache.org/jira/browse/HBASE-28059
>             Project: HBase
>          Issue Type: Improvement
>          Components: Admin
>    Affects Versions: 2.5.5
>            Reporter: Charles Connell
>            Assignee: Charles Connell
>            Priority: Major
>
> When I run a snippet of code like this:
> {code:java}
> Map<byte[], RegionLoad> regionLoadMap = admin
>   .getClusterStatus()
>   .getLoad(
>     ServerName.parseServerName(
>       "my-server.my-company.net,60020,1693513660506"
>     )
>   )
>   .getRegionsLoad();
> for (byte[] startKey : regionLoadMap.keySet()) {
>   RegionLoad regionLoad = regionLoadMap.get(startKey);
>   LOG.info("Region {}: {}", Bytes.toStringBinary(startKey), regionLoad);
> } {code}
> I get logs like this:
> {noformat}
> Region <redacted-table-name>,<redacted row key>,1659484033280.2b89407a1223720344bed425bf3c29b0.: numberOfStores=1, numberOfStorefiles=3, storeRefCount=0, storefileUncompressedSizeMB=17998848, lastMajorCompactionTimestamp=1693211464712, storefileSizeMB=5895, compressionRatio=0.0003, memstoreSizeMB=1, readRequestsCount=118899553, writeRequestsCount=731192, rootIndexSizeKB=9, totalStaticIndexSizeKB=10413, totalStaticBloomSizeKB=6592, totalCompactingKVs=0, currentCompactedKVs=0, compactionProgressPct=NaN, completeSequenceId=78093096, dataLocality=1.0{noformat}
> The {{storefileUncompressedSizeMB}} is vastly larger than the {{{}storefileSizeMB{}}}, so much more that it's not believable. I checked the store files in question in this instance. Adding up the uncompressed size reported in the HFile trailers sums to 5895 MiB, exactly 1024 times less than the reported 17998848.
> The reason for the misreporting is that {{RegionLoad#getStoreUncompressedSizeMB()}} converts the value from a {{Size}} object wrong.
>  



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