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authorShreyas Siravara <sshreyas@fb.com>2016-08-04 11:44:53 -0700
committerJeff Darcy <jdarcy@redhat.com>2017-03-02 18:54:42 -0500
commit351638ba61d2451d97363e71adb9a9ce7d5b9c85 (patch)
tree0892ae7c963caed1c0d8af1835f570b458724e8f
parent6a3f2b5d0542464b14b3263ecf31f995717eee8f (diff)
dht/rebalance: Increase maximum read block size from 128 KB to 1 MB
Summary: - The maximum block size, `DHT_REBALANCE_BLKSIZE`, is set to 128 KB. - As a result, migrating files in the megabytes to gigabytes can take much longer than necessary. - Some preliminary results by bumping the blocksize: With 128 KB: [2016-08-04 11:40:19.251167] I [MSGID: 109028] [dht-rebalance.c:2196:gf_defrag_status_get] 0-glusterfs: Rebalance is completed. Time taken is 15.00 secs [2016-08-04 11:40:19.251189] I [MSGID: 109028] [dht-rebalance.c:2200:gf_defrag_status_get] 0-glusterfs: Files migrated: 49, size: 2569011200, lookups: 149, failures: 0, skipped: 0 With 1 MB: [2016-08-04 11:41:21.093662] I [MSGID: 109028] [dht-rebalance.c:2196:gf_defrag_status_get] 0-glusterfs: Rebalance is completed. Time taken is 7.00 secs [2016-08-04 11:41:21.093687] I [MSGID: 109028] [dht-rebalance.c:2200:gf_defrag_status_get] 0-glusterfs: Files migrated: 49, size: 2569011200, lookups: 149, failures: 0, skipped: 0 - This is a cherry-pick of D3670927 to 3.8. Test Plan: Tested rebalance on devserver. Reviewed By: dph, rwareing Change-Id: Ide2edbf87ef9ae2b32a03f189c57b63e2f233fc8 BUG: 1428055 Signed-off-by: Shreyas Siravara <sshreyas@fb.com> Reviewed-on: https://review.gluster.org/16797 Tested-by: Vijay Bellur <vbellur@redhat.com> Smoke: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
-rw-r--r--xlators/cluster/dht/src/dht-rebalance.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index c851266588d..4f422560449 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -21,7 +21,7 @@
#define GF_DISK_SECTOR_SIZE 512
#define DHT_REBALANCE_PID 4242 /* Change it if required */
-#define DHT_REBALANCE_BLKSIZE (128 * 1024)
+#define DHT_REBALANCE_BLKSIZE (1024 * 1024) /* 1 MB */
#define MAX_MIGRATE_QUEUE_COUNT 500
#define MIN_MIGRATE_QUEUE_COUNT 200