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new b83d0c0 HBASE-22628 [Addendum] Document the custom WAL directory
(hbase.wal.dir) usage
b83d0c0 is described below
commit b83d0c035ffc2d71c11d02bdf4138abf309f2984
Author: Pankaj <pankaj...@huawei.com>
AuthorDate: Thu Jul 25 12:18:05 2019 +0530
HBASE-22628 [Addendum] Document the custom WAL directory (hbase.wal.dir)
usage
Signed-off-by: Reid Chan <reidc...@apache.org>
---
src/main/asciidoc/_chapters/architecture.adoc | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/src/main/asciidoc/_chapters/architecture.adoc
b/src/main/asciidoc/_chapters/architecture.adoc
index d330d85..886ac08 100644
--- a/src/main/asciidoc/_chapters/architecture.adoc
+++ b/src/main/asciidoc/_chapters/architecture.adoc
@@ -2495,19 +2495,19 @@ NOTE: `DefaultSourceFSConfigurationProvider` supports
only `xml` type files. It
=== Custom WAL Directory
HBASE-17437 added support for specifying a WAL directory outside the HBase
root directory or even in a different FileSystem since 1.3.3/2.0+. Some
FileSystems (such as Amazon S3) don’t support append or consistent writes, in
such scenario WAL directory needs to be configured in a different FileSystem to
avoid loss of writes.
-Following configurations were added to accomplish this:
+Following configurations are added to accomplish this:
+
. `hbase.wal.dir`
+
This defines where the root WAL directory is located, could be on a different
FileSystem than the root directory. WAL directory can not be set to a
subdirectory of the root directory. The default value of this is the root
directory if unset.
-+
+
. `hbase.rootdir.perms`
+
Configures FileSystem permissions to set on the root directory. This is '700'
by default.
-+
+
. `hbase.wal.dir.perms`
+
Configures FileSystem permissions to set on the WAL directory FileSystem. This
is '700' by default.
-+
NOTE: While migrating to custom WAL dir (outside the HBase root directory or a
different FileSystem) existing WAL files must be copied manually to new WAL
dir, otherwise it may lead to data loss/inconsistency as HMaster has no
information about previous WAL directory.
