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Date: Thu, 4 May 2017 00:20:04 +0000 (UTC)
From: "Maddineni Sukumar (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-16466) HBase snapshots support in
 VerifyReplication tool to reduce load on live HBase cluster with large
 tables
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archived-at: Thu, 04 May 2017 00:20:08 -0000


    [ https://issues.apache.org/jira/browse/HBASE-16466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15995943#comment-15995943 ] 

Maddineni Sukumar commented on HBASE-16466:
-------------------------------------------

Hi [~zghaobac] , 

I added a condition in doCommandLine to check for this. 
User should provide all four peer snapshot related params or none. 
If user misses any one then we throw validation error saying all peer snapshot related parameters need to be provided. 

Below condition. 
+      if (peerSnapshotName != null || peerSnapshotTmpDir != null || peerFSAddress != null
+          || peerHBaseRootAddress != null) {
+        if (peerSnapshotName == null || peerSnapshotTmpDir == null || peerFSAddress == null
+            || peerHBaseRootAddress == null) {
+          printUsage(
+            "Peer snapshot name, peer snapshot temp location, Peer HBase root address and  "
+                + "peer FSAddress should be provided to use snapshots in peer cluster");
+          return false;
+        }
+      }

> HBase snapshots support in VerifyReplication tool to reduce load on live HBase cluster with large tables
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-16466
>                 URL: https://issues.apache.org/jira/browse/HBASE-16466
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbase
>    Affects Versions: 0.98.21
>            Reporter: Sukumar Maddineni
>            Assignee: Maddineni Sukumar
>             Fix For: 2.0.0
>
>         Attachments: HBASE-16466.branch-1.3.001.patch, HBASE-16466.v1.patch, HBASE-16466.v2.patch, HBASE-16466.v3.patch, HBASE-16466.v4.patch, HBASE-16466.v5.patch
>
>
> As of now VerifyReplicatin tool is running using normal HBase scanners. If you  want to run VerifyReplication multiple times on a production live cluster with large tables then it creates extra load on HBase layer. So if we implement snapshot based support then both in source and target we can read data from snapshots which reduces load on HBase


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