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new 39f2d1d5a87 [improve] [bk] Update the document of
diskUsageWarnThreshold (#21142)
39f2d1d5a87 is described below
commit 39f2d1d5a872ee3c46671c27ca96b1428bfac5ab
Author: Hang Chen <[email protected]>
AuthorDate: Thu Sep 14 09:31:52 2023 +0800
[improve] [bk] Update the document of diskUsageWarnThreshold (#21142)
---
conf/bookkeeper.conf | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/conf/bookkeeper.conf b/conf/bookkeeper.conf
index 77fdca67b41..32d96582595 100644
--- a/conf/bookkeeper.conf
+++ b/conf/bookkeeper.conf
@@ -614,19 +614,19 @@ readOnlyModeEnabled=true
# For each ledger dir, maximum disk space which can be used.
# Default is 0.95f. i.e. 95% of disk can be used at most after which nothing
will
-# be written to that partition. If all ledger dir partitions are full, then
bookie
+# be written to that partition. If all ledger dir partions are full, then
bookie
# will turn to readonly mode if 'readOnlyModeEnabled=true' is set, else it will
-# shutdown.
-# Valid values should be in between 0 and 1 (exclusive).
-diskUsageThreshold=0.95
-
-# The disk free space low water mark threshold.
-# Disk is considered full when usage threshold is exceeded.
-# Disk returns back to non-full state when usage is below low water mark
threshold.
-# This prevents it from going back and forth between these states frequently
-# when concurrent writes and compaction are happening. This also prevent
bookie from
-# switching frequently between read-only and read-writes states in the same
cases.
-# diskUsageWarnThreshold=0.95
+# shutdown. Bookie will also suspend the minor and major compaction when usage
threshold is exceed
+# if `isForceGCAllowWhenNoSpace` is disabled. When the usage becomes lower
than the threshold, the major and minor
+# compaction will be resumed.
+# Valid values should be in between 0 and 1 (exclusive). The default value is
0.95.
+# diskUsageThreshold=0.95
+
+# The disk free space warn threshold.
+# Disk is considered almost full when usage threshold is exceeded. Bookie will
suspend the major
+# compaction when usage threshold is exceed if `isForceGCAllowWhenNoSpace` is
disabled. When the usage becomes lower
+# than the threshold, the major compaction will be resumed. The default value
is 0.90.
+# diskUsageWarnThreshold=0.90
# Set the disk free space low water mark threshold. Disk is considered full
when
# usage threshold is exceeded. Disk returns back to non-full state when usage
is
@@ -634,7 +634,10 @@ diskUsageThreshold=0.95
# between these states frequently when concurrent writes and compaction are
# happening. This also prevent bookie from switching frequently between
# read-only and read-writes states in the same cases.
-# diskUsageLwmThreshold=0.90
+# If the bookie already runs into read-only mode and the disk usage becomes
lower than this threshold, the bookie
+# will change from read-only to read-write mode. At the same time, the major
and minor compaction will be resumed
+# if `isForceGCAllowWhenNoSpace` is disabled. The default value is the same
with `diskUsageThreshold`.
+# diskUsageLwmThreshold=0.95
# Disk check interval in milli seconds, interval to check the ledger dirs
usage.
# Default is 10000
