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Posted to common-commits@hadoop.apache.org by in...@apache.org on 2021/11/08 18:22:16 UTC
[hadoop] branch trunk updated: HDFS-16307. Improve
HdfsBlockPlacementPolicies docs readability
This is an automated email from the ASF dual-hosted git repository.
inigoiri pushed a commit to branch trunk
in repository https://gitbox.apache.org/repos/asf/hadoop.git
The following commit(s) were added to refs/heads/trunk by this push:
new 9b2fa7e HDFS-16307. Improve HdfsBlockPlacementPolicies docs readability
9b2fa7e is described below
commit 9b2fa7e47a3253df9e3c415dc0f9c39cb2d42a69
Author: GuoPhilipse <46...@users.noreply.github.com>
AuthorDate: Tue Nov 9 02:21:39 2021 +0800
HDFS-16307. Improve HdfsBlockPlacementPolicies docs readability
---
.../hadoop-hdfs/src/site/markdown/HdfsBlockPlacementPolicies.md | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsBlockPlacementPolicies.md b/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsBlockPlacementPolicies.md
index cc664ec..102c31f 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsBlockPlacementPolicies.md
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HdfsBlockPlacementPolicies.md
@@ -22,7 +22,7 @@ By default HDFS supports BlockPlacementPolicyDefault. Where one block on local a
## BlockPlacementPolicyRackFaultTolerant
-BlockPlacementPolicyRackFaultTolerant can be used to split the placement of blocks across multiple rack.By default with replication of 3 BlockPlacementPolicyDefault will put one replica on the local machine if the writer is on a datanode, otherwise on a random datanode in the same rack as that of the writer, another replica on a node in a different (remote) rack, and the last on a different node in the same remote rack. So totally 2 racks will be used, in sceneraio like 2 racks going do [...]
+BlockPlacementPolicyRackFaultTolerant can be used to split the placement of blocks across multiple rack. By default, with replication of 3 BlockPlacementPolicyDefault will put one replica on the local machine if the writer is on a datanode, otherwise on a random datanode in the same rack as that of the writer, another replica on a node in a different (remote) rack, and the last on a different node in the same remote rack. So totally 2 racks will be used, in scenario like 2 racks going d [...]
For more details check [HDFS-7891](https://issues.apache.org/jira/browse/HDFS-7891)
@@ -42,7 +42,7 @@ For more details check [HDFS-7891](https://issues.apache.org/jira/browse/HDFS-78
## BlockPlacementPolicyWithNodeGroup
-With new 3 layer hierarchical topology, a node group level got introduced, which maps well onto a infrastructure that is based on a virtulized environment. In Virtualized environment multiple vm's will be hosted on same physical machine. Vm's on the same physical host are affected by the same hardware failure. So mapping the physical host a node groups this block placement gurantees that it will never place more than one replica on the same node group (physical host), in case of node gro [...]
+With new 3 layer hierarchical topology, a node group level got introduced, which maps well onto an infrastructure that is based on a virtualized environment. In Virtualized environment multiple vm's will be hosted on same physical machine. Vm's on the same physical host are affected by the same hardware failure. So mapping the physical host a node groups this block placement guarantees that it will never place more than one replica on the same node group (physical host), in case of node [...]
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