glusterFS performance

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Hi,

I have  two server nodes, gluster1  & gluster2 ,running  on Ubuntu 14.04, and  is  using gluster ver 3.7.6 . I am  using fio tools  ver 2.6  for  testing  performance.(IO engine= libaio)




gluster1  server node  is a  high performance CPU (8 core , i7/3.4GHz)  with  SSD (random rw performance  without glusterFS  is ~14MB/s with ext4 FS, 150 GB ), while

gluster2 is a Pentium g840 CPU (2 core, 2.8GHz) with a WD HDD of 1 TB size.(random rw performance without glusterFS  is ~500KB/s only with ext4).


1. I  see gluster1  seq read performance is much higher  than gluster 2. See below data(in KB/s).Is this  because gluster1 CPU is better  and  it is  using SSD ?(replica 2)



Seq. readSeq. write
gluster131988283253
gluster213593161059




2. I also  see  gluster2 performs  well  when configured  as distributed  volumes, compared  to gluster1. Why is it  so ? Pls see  the  below  data.(in KB/s)


random readrandom write
gluster110291027
gluster233583353






Expecting experts'  answer.


Best Regards,

JK


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