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Gandalf Corvotempesta

2017-Oct-10 14:53 UTC

[Gluster-users] small files performance

2017-10-10 8:25 GMT+02:00 Karan Sandha <ksandha at redhat.com>:
> 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-cache
> gluster v set <vol-name> group nl-cache
> gluster 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-test
fio-test: (g=0): rw=randrw, bs=8K-8K/8K-8K/8K-8K, ioengine=libaio,
iodepth=16
...
fio-2.16
Starting 16 processes
fio-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 2017
  read : io=43392KB, bw=733103B/s, iops=89, runt= 60610msec
    slat (usec): min=14, max=1992.5K, avg=177873.67, stdev=382294.06
    clat (usec): min=768, max=6016.8K, avg=1871390.57, stdev=1082220.06
     lat (usec): min=872, max=6630.6K, avg=2049264.23, stdev=1158405.41
    clat 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= 60610msec
    slat (usec): min=17, max=3428, avg=212.62, stdev=287.88
    clat (usec): min=59, max=6015.6K, avg=1693729.12, stdev=1003122.83
     lat (usec): min=79, max=6015.9K, avg=1693941.74, stdev=1003126.51
    clat 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=295
  IO 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=0
     latency   : target=0, window=0, percentile=100.00%, depth=16

Run status group 0 (all jobs):
   READ: io=43392KB, aggrb=715KB/s, minb=715KB/s, maxb=715KB/s,
mint=60610msec, maxt=60610msec
  WRITE: io=18856KB, aggrb=311KB/s, minb=311KB/s, maxb=311KB/s,
mint=60610msec, maxt=60610msec
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Alastair Neil

2017-Oct-10 21:59 UTC

head link

[Gluster-users] small files performance

I just tried setting:

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 on

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.

Any ideas?


On 10 October 2017 at 10:53, Gandalf Corvotempesta <
gandalf.corvotempesta at gmail.com> wrote:
> 2017-10-10 8:25 GMT+02:00 Karan Sandha <ksandha at redhat.com>:
>
>> 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-cache
>> gluster v set <vol-name> group nl-cache
>> gluster 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-test
> fio-test: (g=0): rw=randrw, bs=8K-8K/8K-8K/8K-8K, ioengine=libaio,
> iodepth=16
> ...
> fio-2.16
> Starting 16 processes
> fio-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 2017
>   read : io=43392KB, bw=733103B/s, iops=89, runt= 60610msec
>     slat (usec): min=14, max=1992.5K, avg=177873.67, stdev=382294.06
>     clat (usec): min=768, max=6016.8K, avg=1871390.57, stdev=1082220.06
>      lat (usec): min=872, max=6630.6K, avg=2049264.23, stdev=1158405.41
>     clat 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= 60610msec
>     slat (usec): min=17, max=3428, avg=212.62, stdev=287.88
>     clat (usec): min=59, max=6015.6K, avg=1693729.12, stdev=1003122.83
>      lat (usec): min=79, max=6015.9K, avg=1693941.74, stdev=1003126.51
>     clat 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=295
>   IO 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=0
>      latency   : target=0, window=0, percentile=100.00%, depth=16
>
> Run status group 0 (all jobs):
>    READ: io=43392KB, aggrb=715KB/s, minb=715KB/s, maxb=715KB/s,
> mint=60610msec, maxt=60610msec
>   WRITE: io=18856KB, aggrb=311KB/s, minb=311KB/s, maxb=311KB/s,
> mint=60610msec, maxt=60610msec
>
>
>
>
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
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Poornima Gurusiddaiah

2017-Oct-12 05:18 UTC

head link

[Gluster-users] small files performance

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 

----- Original Message -----
> From: "Alastair Neil" <ajneil.tech at gmail.com>
> To: "gluster-users" <Gluster-users at gluster.org>
> Sent: Wednesday, October 11, 2017 3:29:10 AM
> Subject: Re: [Gluster-users] small files performance
> I just tried setting:
> 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 on
> 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.
> Any ideas?
> On 10 October 2017 at 10:53, Gandalf Corvotempesta <
> gandalf.corvotempesta at gmail.com > wrote:
> > 2017-10-10 8:25 GMT+02:00 Karan Sandha < ksandha at redhat.com >
:
> 
> > > 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-cache
> > 
> 
> > > gluster v set <vol-name> group nl-cache
> > 
> 
> > > gluster 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-test
> 
> > fio-test: (g=0): rw=randrw, bs=8K-8K/8K-8K/8K-8K, ioengine=libaio,
> > iodepth=16
> 
> > ...
> 
> > fio-2.16
> 
> > Starting 16 processes
> 
> > fio-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
2017
> 
> > read : io=43392KB, bw=733103B/s, iops=89, runt= 60610msec
> 
> > slat (usec): min=14, max=1992.5K, avg=177873.67, stdev=382294.06
> 
> > clat (usec): min=768, max=6016.8K, avg=1871390.57, stdev=1082220.06
> 
> > lat (usec): min=872, max=6630.6K, avg=2049264.23, stdev=1158405.41
> 
> > clat 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= 60610msec
> 
> > slat (usec): min=17, max=3428, avg=212.62, stdev=287.88
> 
> > clat (usec): min=59, max=6015.6K, avg=1693729.12, stdev=1003122.83
> 
> > lat (usec): min=79, max=6015.9K, avg=1693941.74, stdev=1003126.51
> 
> > clat 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=295
> 
> > IO 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=0
> 
> > latency : target=0, window=0, percentile=100.00%, depth=16
> 
> > Run status group 0 (all jobs):
> 
> > READ: io=43392KB, aggrb=715KB/s, minb=715KB/s, maxb=715KB/s,
> > mint=60610msec,
> > maxt=60610msec
> 
> > WRITE: io=18856KB, aggrb=311KB/s, minb=311KB/s, maxb=311KB/s,
> > mint=60610msec,
> > maxt=60610msec
> 
> > _______________________________________________
> 
> > Gluster-users mailing list
> 
> > Gluster-users at gluster.org
> 
> > http://lists.gluster.org/mailman/listinfo/gluster-users
> 
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
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