[Gluster-users] New cluster - first experience

[Gandalf Corvotempesta]

Shard was enabled during this test that previously i did other tests with
shard disabled and speed doesn't change at all.
Il 12 lug 2016 5:17 PM, "Pranith Kumar Karampuri" <pkarampu at redhat.com> ha
scritto:

> You got this for single dd workload? Ideally single file dd workload
> should be dominated by 'WRITE' operation, but seems like it is dominated by
> too many FINODELK, I see quite a few mknods too. What is puzzling is the
> number of ENTRYLKs which is of the order of 10k. I see some discussion
> about enabling sharding, Did you enable sharding by anychance on this
> volume? Sharding is not yet ready for general purpose workloads. As long as
> you have single writer workload it is fine. It is very well tested for VM
> workload.
>
>
> dd workload generally looks like this (dd if=/dev/zero of=a.txt bs=1M
> count=1000):
>
>
> Brick: localhost.localdomain:/home/gfs/r2_0
> -------------------------------------------
> Cumulative Stats:
>    Block Size:             131072b+              262144b+
>  No. of Reads:                    0                     0
> No. of Writes:                 7996                     2
>  %-latency   Avg-latency   Min-Latency   Max-Latency   No. of
> calls         Fop
>  ---------   -----------   -----------   -----------   ------------
> ----
>       0.00       0.00 us       0.00 us       0.00 us              1
> RELEASE
>       0.00       0.00 us       0.00 us       0.00 us              3
> RELEASEDIR
>       0.00      24.00 us      24.00 us      24.00 us              1
> STATFS
>       0.00      22.50 us      22.00 us      23.00 us              2
> ENTRYLK
>       0.00      28.00 us      27.00 us      29.00 us              2
> FINODELK
>       0.00      67.00 us      67.00 us      67.00 us              1
> GETXATTR
>       0.00      35.50 us      28.00 us      43.00 us              2
> FLUSH
>       0.01     342.00 us     342.00 us     342.00 us              1
> CREATE
>       0.10     134.61 us      54.00 us     379.00 us             18
> FXATTROP
>       0.23      67.71 us      41.00 us     156.00 us             83
> LOOKUP
>      99.65     307.53 us      61.00 us   50633.00 us           7998
> WRITE
>
>
> On Tue, Jul 12, 2016 at 8:16 PM, Gandalf Corvotempesta <
> gandalf.corvotempesta at gmail.com> wrote:
>
>> 2016-07-12 15:55 GMT+02:00 Pranith Kumar Karampuri <pkarampu at redhat.com>:
>> > Could you do the following?
>> >
>> > # gluster volume profile <volname> start
>> > # run dd command
>> > # gluster volume profile <volname> info >
>> > /path/to/file/that/you/need/to/send/us.txt
>>
>> http://pastebin.com/raw/wcA0i335
>>
>
>
>
> --
> Pranith
>
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