Re: Slow write times to gluster disk

Pat Haley <phaley@xxxxxxx> · Wed, 10 May 2017 12:05:25 -0400



    Without the oflag=sync and only a single test of each, the FUSE is
    going faster than NFS:

    
    FUSE:

    mseas-data2(dri_nascar)% dd if=/dev/zero count=4096 bs=1048576
      of=zeros.txt conv=sync

    4096+0 records in

    4096+0 records out

    4294967296 bytes (4.3 GB) copied, 7.46961 s, 575 MB/s

    
    NFS

    mseas-data2(HYCOM)% dd if=/dev/zero count=4096 bs=1048576
      of=zeros.txt conv=sync

    4096+0 records in

    4096+0 records out

    4294967296 bytes (4.3 GB) copied, 11.4264 s, 376 MB/s

    
    On 05/10/2017 11:53 AM, Pranith Kumar
      Karampuri wrote:

    
      Could you let me know the speed without oflag=sync
        on both the mounts? No need to collect profiles.

      
        On Wed, May 10, 2017 at 9:17 PM, Pat
          Haley <phaley@xxxxxxx>
          wrote:

          
              Here is what I see now:

              
              [root@mseas-data2 ~]# gluster volume info

                 
                Volume Name: data-volume

                Type: Distribute

                Volume ID: c162161e-2a2d-4dac-b015-f31fd89ceb18

                Status: Started

                Number of Bricks: 2

                Transport-type: tcp

                Bricks:

                Brick1: mseas-data2:/mnt/brick1

                Brick2: mseas-data2:/mnt/brick2

                Options Reconfigured:

                diagnostics.count-fop-hits: on

              diagnostics.latency-measurement: on

              nfs.exports-auth-enable: on

              diagnostics.brick-sys-log-level: WARNING

                performance.readdir-ahead: on

                nfs.disable: on

                nfs.export-volumes: off

                
                  On
                    05/10/2017 11:44 AM, Pranith Kumar Karampuri wrote:

                  
                      Is this the volume info you have?

                        
                        >     [root at mseas-data2 ~]# gluster volume info
>
>     Volume Name: data-volume
>     Type: Distribute
>     Volume ID: c162161e-2a2d-4dac-b015-f31fd89ceb18
>     Status: Started
>     Number of Bricks: 2
>     Transport-type: tcp
>     Bricks:
>     Brick1: mseas-data2:/mnt/brick1
>     Brick2: mseas-data2:/mnt/brick2
>     Options Reconfigured:
>     performance.readdir-ahead: on
>     nfs.disable: on
>     nfs.export-volumes: off


        I copied this from old thread from 2016. This is distribute
        volume. Did you change any of the options in between?

      
-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301

  
-- 
Pranith


-- 

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley                          Email:  phaley@xxxxxxx
Center for Ocean Engineering       Phone:  (617) 253-6824
Dept. of Mechanical Engineering    Fax:    (617) 253-8125
MIT, Room 5-213                    http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA  02139-4301
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