From 72e58a8fed29be3f1b274fb17f46e6632f9064a3 Mon Sep 17 00:00:00 2001 From: Wellington Chevreuil Date: Tue, 16 Jul 2019 18:36:43 +0100 Subject: [PATCH] HBASE-21462 Add note for CopyTable section explaining it does not perform a diff, but a full write from source to target Signed-off-by: Josh Elser --- src/main/asciidoc/_chapters/ops_mgt.adoc | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/main/asciidoc/_chapters/ops_mgt.adoc b/src/main/asciidoc/_chapters/ops_mgt.adoc index 41965851ffe..716b20790d3 100644 --- a/src/main/asciidoc/_chapters/ops_mgt.adoc +++ b/src/main/asciidoc/_chapters/ops_mgt.adoc @@ -528,6 +528,13 @@ Caching for the input Scan is configured via `hbase.client.scanner.caching` By default, CopyTable utility only copies the latest version of row cells unless `--versions=n` is explicitly specified in the command. ==== +.Data Load +[NOTE] +==== +CopyTable does not perform a diff, it copies all Cells in between the specified startrow/stoprow starttime/endtime range. +This means that already existing cells with same values will still be copied. +==== + See Jonathan Hsieh's link:https://blog.cloudera.com/blog/2012/06/online-hbase-backups-with-copytable-2/[Online HBase Backups with CopyTable] blog post for more on `CopyTable`.