diff options
| author | Shreyas Siravara <sshreyas@fb.com> | 2016-08-04 11:44:53 -0700 |
|---|---|---|
| committer | Jeff Darcy <jdarcy@redhat.com> | 2017-03-02 18:54:42 -0500 |
| commit | 351638ba61d2451d97363e71adb9a9ce7d5b9c85 (patch) | |
| tree | 0892ae7c963caed1c0d8af1835f570b458724e8f | |
| parent | 6a3f2b5d0542464b14b3263ecf31f995717eee8f (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.c | 2 |
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 |