On 3/18/2018 6:13 PM, Sam McLeod wrote:
Even your NFS transfers are 12.5 or so MB per second or less.
1) Did you use fdisk and LVM under that XFS filesystem?
2) Did you benchmark the XFS with something like bonnie++? (There's
probably newer benchmark suites now.)
3) Did you benchmark your Network transfer speeds? Perhaps your NIC
negotiated a lower speed.
3) I've done XFS tuning for another purpose but got good results. If it
helps, I can send you the doc.
Cheers,
Tom
Howdy all,
We're experiencing terrible small file performance when copying or
moving files on gluster clients.
In the example below, Gluster is taking 6mins~ to copy 128MB / 21,000
files sideways on a client, doing the same thing on NFS (which I know is
a totally different solution etc. etc.) takes approximately 10-15
seconds(!).
Any advice for tuning the volume or XFS settings would be greatly
appreciated.
Hopefully I've included enough relevant information below.
## Gluster Client
root@gluster-client:/mnt/gluster_perf_test/ # du -sh .
127M .
root@gluster-client:/mnt/gluster_perf_test/ # find . -type f | wc -l
21791
root@gluster-client:/mnt/gluster_perf_test/ # du 9584toto9584.txt
4 9584toto9584.txt
root@gluster-client:/mnt/gluster_perf_test/ # time cp -a private
private_perf_test
real 5m51.862s
user 0m0.862s
sys 0m8.334s
root@gluster-client:/mnt/gluster_perf_test/ # time rm -rf private_perf_test/
real 0m49.702s
user 0m0.087s
sys 0m0.958s
## Hosts
- 16x Intel(R) Xeon(R) CPU E5-2680 v4 @ 2.40GHz per Gluster host / client
- Storage: iSCSI provisioned (via 10Gbit DAC/Fibre), SSD disk, 50K R/RW
4k IOP/s, 400MB/s per Gluster host
- Volumes are replicated across two hosts and one arbiter only host
- Networking is 10Gbit DAC/Fibre between Gluster hosts and clients
- 18GB DDR4 ECC memory
## Volume Info
root@gluster-host-01:~ # gluster pool list
UUID Hostname State
ad02970b-e2aa-4ca8-998c-bd10d5970faa gluster-host-02.fqdn Connected
ea116a94-c19e-48db-b108-0be3ae622e2e gluster-host-03.fqdn Connected
2e855c25-e7ac-4ff6-be85-e8bcc6f45ee4 localhost
Connected
root@gluster-host-01:~ # gluster volume info uat_storage
Volume Name: uat_storage
Type: Replicate
Volume ID: 7918f1c5-5031-47b8-b054-56f6f0c569a2
Status: Started
Snapshot Count: 0
Number of Bricks: 1 x (2 + 1) = 3
Transport-type: tcp
Bricks:
Brick1: gluster-host-01.fqdn:/mnt/gluster-storage/uat_storage
Brick2: gluster-host-02.fqdn:/mnt/gluster-storage/uat_storage
Brick3: gluster-host-03.fqdn:/mnt/gluster-storage/uat_storage (arbiter)
Options Reconfigured:
performance.rda-cache-limit: 256MB
network.inode-lru-limit: 50000
server.outstanding-rpc-limit: 256
performance.client-io-threads: true
nfs.disable: on
transport.address-family: inet
client.event-threads: 8
cluster.eager-lock: true
cluster.favorite-child-policy: size
cluster.lookup-optimize: true
cluster.readdir-optimize: true
cluster.use-compound-fops: true
diagnostics.brick-log-level: ERROR
diagnostics.client-log-level: ERROR
features.cache-invalidation-timeout: 600
features.cache-invalidation: true
network.ping-timeout: 15
performance.cache-invalidation: true
performance.cache-max-file-size: 6MB
performance.cache-refresh-timeout: 60
performance.cache-size: 1024MB
performance.io <http://performance.io>-thread-count: 16
performance.md-cache-timeout: 600
performance.stat-prefetch: true
performance.write-behind-window-size: 256MB
server.event-threads: 8
transport.listen-backlog: 2048
root@gluster-host-01:~ # xfs_info /dev/mapper/gluster-storage-unlocked
meta-data=/dev/mapper/gluster-storage-unlocked isize=512 agcount=4,
agsize=196607360 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=786429440, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=8192 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=383998, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
--
Sam McLeod (protoporpoise on IRC)
https://smcleod.net
https://twitter.com/s_mcleod
Words are my own opinions and do not necessarily represent those of
my employer or partners.
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--
Cheers,
Tom K.
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