CHANGELOG of v2.6

Previous change logs can be found at CHANGELOG-2.5

Features

• curvefs/client: add qos for curve-fuse, we can limits the bandwidth, thanks to @UniverseParticle.
• curvefs/client:add memcache to warmup, thanks to @Cyber-SiKu.

Improve

• curvefs/client: improve metadata performance, thanks to @Wine93.
• curvefs/client: change the data organization format, thanks to @201341.
• curvefs/client: optimize DiskCacheManager::UmountDiskCache(), thanks to @Ziy1-Tan.
• curvefs/client: add memcached startup check, thanks to @Ziy1-Tan.

Bugfix

• curvefs/client: enableSumInDir in multi-mount situation, thanks to @bit-dance.
• curvefs/client: fuse client exit when cache size less than 8MB, thanks to @Ziy1-Tan.
• curvefs/client: remove unused setting fuseMaxSize, thanks to @Ziy1-Tan.
• curvefs/client: enable async read for FileCacheManager::ReadKVRequest, thanks to @Ziy1-Tan.

Performance

Hardware

3 nodes (3_mds, 9_metaserver), each with:

• Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz
• 256G RAM
• disk cache: INTEL SSDSC2BB80 800G (IOPS is about 30000+, bandwidth is about 300 MiB)

Configure

fs.cto: true
fs.lookupCache.negativeTimeoutSec: 1
fs.lookupCache.minUses: 3
fuseClient.supportKVcache: true
client.loglevel: 0

fio

[global]
rw=randread
direct=1
size=50G
iodepth=128
ioengine=libaio
bsrange=4k-4k
ramp_time=10
runtime=300
group_reporting
[disk01]
filename=/path/to/mountpoint/1.txt

mdtest

for i in 1 4 8; do mpirun --allow-run-as-root -np $i mdtest -z 2 -b 3 -I 10000 -d /path/to/mountpoint; done