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-   -   cman init: allow dlm hash table sizes to be tunable at startup (http://www.linux-archive.org/cluster-development/687173-cman-init-allow-dlm-hash-table-sizes-tunable-startup.html)

"Fabio M. Di Nitto" 07-25-2012 05:32 AM

cman init: allow dlm hash table sizes to be tunable at startup
 
From: "Fabio M. Di Nitto" <fdinitto@redhat.com>

Resolves: rhbz#842370

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
---
cman/init.d/cman.in | 28 ++++++++++++++++++++++++++++
cman/init.d/cman.init.defaults.in | 7 +++++++
2 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/cman/init.d/cman.in b/cman/init.d/cman.in
index 9a0d726..9de349d 100644
--- a/cman/init.d/cman.in
+++ b/cman/init.d/cman.in
@@ -110,6 +110,13 @@ fi
# DLM_CONTROLD_OPTS -- allow extra options to be passed to dlm_controld daemon.
[ -z "$DLM_CONTROLD_OPTS" ] && DLM_CONTROLD_OPTS=""

+# DLM_LKBTBL_SIZE - DLM_RSBTBL_SIZE - DLM_DIRTBL_SIZE
+# Allow tuning of DLM kernel hash table sizes.
+# do NOT change unless instructed to do so.
+[ -z "$DLM_LKBTBL_SIZE" ] && DLM_LKBTBL_SIZE=""
+[ -z "$DLM_RSBTBL_SIZE" ] && DLM_RSBTBL_SIZE=""
+[ -z "$DLM_DIRTBL_SIZE" ] && DLM_DIRTBL_SIZE=""
+
# FENCE_JOIN_TIMEOUT -- seconds to wait for fence domain join to
# complete. If the join hasn't completed in this time, fence_tool join
# exits with an error, and this script exits with an error. To wait
@@ -706,6 +713,23 @@ leave_fence_domain()
fi
}

+tune_dlm_hash_sizes()
+{
+ dlmdir="/sys/kernel/config/dlm/cluster"
+
+ [ -n "$DLM_LKBTBL_SIZE" ] && [ -f $dlmdir/lkbtbl_size ] &&
+ echo $DLM_LKBTBL_SIZE > $dlmdir/lkbtbl_size
+
+ [ -n "$DLM_RSBTBL_SIZE" ] && [ -f $dlmdir/rsbtbl_size ] &&
+ echo $DLM_RSBTBL_SIZE > $dlmdir/rsbtbl_size
+
+ [ -n "$DLM_DIRTBL_SIZE" ] && [ -f $dlmdir/dirtbl_size ] &&
+ echo $DLM_DIRTBL_SIZE > $dlmdir/dirtbl_size
+
+ return 0
+}
+
+
start()
{
currentaction="start"
@@ -773,6 +797,10 @@ start()
none
"Starting dlm_controld"

+ runwrap tune_dlm_hash_sizes
+ none
+ "Tuning DLM kernel hash tables"
+
runwrap start_gfs_controld
none
"Starting gfs_controld"
diff --git a/cman/init.d/cman.init.defaults.in b/cman/init.d/cman.init.defaults.in
index 1b7913e..bbaa049 100644
--- a/cman/init.d/cman.init.defaults.in
+++ b/cman/init.d/cman.init.defaults.in
@@ -34,6 +34,13 @@
# DLM_CONTROLD_OPTS -- allow extra options to be passed to dlm_controld daemon.
#DLM_CONTROLD_OPTS=""

+# DLM_LKBTBL_SIZE - DLM_RSBTBL_SIZE - DLM_DIRTBL_SIZE
+# Allow tuning of DLM kernel hash table sizes.
+# do NOT change unless instructed to do so.
+#DLM_LKBTBL_SIZE=""
+#DLM_RSBTBL_SIZE=""
+#DLM_DIRTBL_SIZE=""
+
# FENCE_JOIN_TIMEOUT -- seconds to wait for fence domain join to
# complete. If the join hasn't completed in this time, fence_tool join
# exits with an error, and this script exits with an error. To wait
--
1.7.7.6


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