Re: [ceph-users] 回复：Re: testing ceph performance issue
How much performance can be improved if use SSDs to storage journals? You will see roughly twice the throughput unless you are using btrfs (still improved but not as dramatic). You will also see lower latency because the disk head doesn't have to seek back and forth between journal and data partitions. Kernel RBD Driver , what is this ? There are several RBD implementations, one is the kernel RBD driver in upstream Linux, another is built into Qemu/KVM. and we want to know the RBD if support XEN virual ? It is possible, but not nearly as well tested and not prevalent as RBD via Qemu/KVM. This might be a starting point if your interested in testing Xen/RBD integration: http://wiki.xenproject.org/wiki/Ceph_and_libvirt_technology_preview Hope that helps! -- Kyle ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
[ceph-users] 回复：Re: testing ceph performance issue
Hi Mark Thanks your reply! Yes, 33T OSD we are use 1 disk per OSD. - Do you use SSDs for journals? Ask: don't use SSDs for journals , how much performance can be improved if use SSDs to storage journals? - What CPU do you have in each node? Ask: CPU : Intel(R) Xeon(R) CPU E5-2420 0 @ 1.90GHz - What OS/Kernel? Ask : Kernel : 3.11.6-1.el6xen.x86_64 - Are you using QEMU/KVM or Kernel RBD Driver? we don't use QEMU/KVM , now we direct copy virtual image to block storage directory ,and then use samba share this directory to other hosts. Kernel RBD Driver , what is this ? and we want to know the RBD if support XEN virual ? Thanks a lot! - 原始邮件 - 发件人：Mark Nelson mark.nel...@inktank.com 收件人：ceph-users@lists.ceph.com 主题：Re: [ceph-users] testing ceph performance issue 日期：2013年11月26日 23点23分 ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
