Hi,
Parallel-readdir is an experimental feature for 3.10, can you disable performance.parallel-readdir option and see if the files are visible? Does the unmount-mount help?
Also If you want to use parallel-readdir in production please use 3.11 or greater.
Regards,
Poornima
From: "Alastair Neil" <ajneil.tech@xxxxxxxxx>
To: "gluster-users" <Gluster-users@xxxxxxxxxxx>
Sent: Wednesday, October 11, 2017 3:29:10 AM
Subject: Re: small files performanceAny ideas?I just tried setting:and clients could not see their files with ls when accessing via a fuse mount. The files and directories were there, however, if you accessed them directly. Server are 3.10.5 and the clients are 3.10 and 3.12.performance.parallel-readdir on
features.cache-invalidation on
features.cache-invalidation-timeout 600
performance.stat-prefetch
performance.cache-invalidation
performance.md-cache-timeout 600
network.inode-lru-limit 50000
performance.cache-invalidation onOn 10 October 2017 at 10:53, Gandalf Corvotempesta <gandalf.corvotempesta@xxxxxxxxx> wrote:2017-10-10 8:25 GMT+02:00 Karan Sandha <ksandha@xxxxxxxxxx>:Hi Gandalf,We have multiple tuning to do for small-files which decrease the time for negative lookups , meta-data caching, parallel readdir. Bumping the server and client event threads will help you out in increasing the small file performance.gluster v set <vol-name> group metadata-cachegluster v set <vol-name> group nl-cachegluster v set <vol-name> performance.parallel-readdir on (Note : readdir should be on)This is what i'm getting with suggested parameters.I'm running "fio" from a mounted gluster client:172.16.0.12:/gv0 on /mnt2 type fuse.glusterfs (rw,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072)# fio --ioengine=libaio --filename=fio.test --size=256M --direct=1 --rw=randrw --refill_buffers --norandommap --bs=8k --rwmixread=70 --iodepth=16 --numjobs=16 --runtime=60 --group_reporting --name=fio-testfio-test: (g=0): rw=randrw, bs=8K-8K/8K-8K/8K-8K, ioengine=libaio, iodepth=16...fio-2.16Starting 16 processesfio-test: Laying out IO file(s) (1 file(s) / 256MB)Jobs: 14 (f=13): [m(5),_(1),m(8),f(1),_(1)] [33.9% done] [1000KB/440KB/0KB /s] [125/55/0 iops] [eta 01m:59s]fio-test: (groupid=0, jobs=16): err= 0: pid=2051: Tue Oct 10 16:51:46 2017read : io=43392KB, bw=733103B/s, iops=89, runt= 60610msecslat (usec): min=14, max=1992.5K, avg=177873.67, stdev=382294.06clat (usec): min=768, max=6016.8K, avg=1871390.57, stdev=1082220.06lat (usec): min=872, max=6630.6K, avg=2049264.23, stdev=1158405.41clat percentiles (msec):| 1.00th=[ 20], 5.00th=[ 208], 10.00th=[ 457], 20.00th=[ 873],| 30.00th=[ 1237], 40.00th=[ 1516], 50.00th=[ 1795], 60.00th=[ 2073],| 70.00th=[ 2442], 80.00th=[ 2835], 90.00th=[ 3326], 95.00th=[ 3785],| 99.00th=[ 4555], 99.50th=[ 4948], 99.90th=[ 5211], 99.95th=[ 5800],| 99.99th=[ 5997]write: io=18856KB, bw=318570B/s, iops=38, runt= 60610msecslat (usec): min=17, max=3428, avg=212.62, stdev=287.88clat (usec): min=59, max=6015.6K, avg=1693729.12, stdev=1003122.83lat (usec): min=79, max=6015.9K, avg=1693941.74, stdev=1003126.51clat percentiles (usec):| 1.00th=[ 724], 5.00th=[144384], 10.00th=[403456], 20.00th=[765952],| 30.00th=[1105920], 40.00th=[1368064], 50.00th=[1630208], 60.00th=[1875968],| 70.00th=[2179072], 80.00th=[2572288], 90.00th=[3031040], 95.00th=[3489792],| 99.00th=[4227072], 99.50th=[4423680], 99.90th=[4751360], 99.95th=[5210112],| 99.99th=[5996544]lat (usec) : 100=0.15%, 250=0.05%, 500=0.06%, 750=0.09%, 1000=0.05%lat (msec) : 2=0.28%, 4=0.09%, 10=0.15%, 20=0.39%, 50=1.81%lat (msec) : 100=1.02%, 250=1.63%, 500=5.59%, 750=6.03%, 1000=7.31%lat (msec) : 2000=35.61%, >=2000=39.67%cpu : usr=0.01%, sys=0.01%, ctx=8218, majf=11, minf=295IO depths : 1=0.2%, 2=0.4%, 4=0.8%, 8=1.6%, 16=96.9%, 32=0.0%, >=64=0.0%submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%complete : 0=0.0%, 4=99.8%, 8=0.0%, 16=0.2%, 32=0.0%, 64=0.0%, >=64=0.0%issued : total=r=5424/w=2357/d=0, short=r=0/w=0/d=0, drop=r=0/w=0/d=0latency : target=0, window=0, percentile=100.00%, depth=16Run status group 0 (all jobs):READ: io=43392KB, aggrb=715KB/s, minb=715KB/s, maxb=715KB/s, mint=60610msec, maxt=60610msecWRITE: io=18856KB, aggrb=311KB/s, minb=311KB/s, maxb=311KB/s, mint=60610msec, maxt=60610msec
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