Re: [ceph-users] Ceph data consistency

2014-12-30 Thread Paweł Sadowski
meaning data has been lost. OSD will not be aware of this. > Xiaoxi > > -Original Message- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > Pawe? Sadowski > Sent: Tuesday, December 30, 2014 4:

Re: [ceph-users] Ceph data consistency

2014-12-30 Thread Chen, Xiaoxi
ing comfortable:) Xiaoxi -Original Message- From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Pawe? Sadowski Sent: Tuesday, December 30, 2014 4:10 PM To: ceph-users Subject: [ceph-users] Ceph data consistency H

[ceph-users] Ceph data consistency

2014-12-30 Thread Paweł Sadowski
Hi, On our Ceph cluster from time to time we have some inconsistent PGs (after deep-scrub). We have some issues with disk/sata cables/lsi controller causing IO errors from time to time (but that's not the point in this case). When IO error occurs on OSD journal partition everything works as is sh

Re: [ceph-users] ceph data consistency

2014-09-09 Thread Chen, Xiaoxi
...@ceph.com Subject: [ceph-users] ceph data consistency hi, everyone: when I read the filestore.cc, I find the ceph use crc the check the data. Why should check the data? In my knowledge, the disk has error-correcting code<http://en.wikipedia.org/wiki/Error-correcting_code> (ECC) fo

Re: [ceph-users] ceph data consistency

2014-09-09 Thread Sage Weil
On Thu, 4 Sep 2014, wrote: > > hi, guys: >   >   when I read the filestore.cc, I find the ceph use crc the check the data. > Why should check the data? > >   In my knowledge,  the disk has error-correcting code (ECC) for each > sector. Looking at wiki: http://en.wikipedia.org/wiki/Disk_s

Re: [ceph-users] ceph data consistency

2014-09-09 Thread Christian Balzer
On Thu, 4 Sep 2014 16:31:12 +0800 池信泽 wrote: > hi, everyone: > > when I read the filestore.cc, I find the ceph use crc the check the > data. Why should check the data? > It should do even more, it should also do checksums for all replicas: > In my knowledge, the disk has error-correcting c

[ceph-users] ceph data consistency

2014-09-09 Thread ????????
hi, guys: when I read the filestore.cc, I find the ceph use crc the check the data. Why should check the data? In my knowledge, the disk has error-correcting code (ECC) for each sector. Looking at wiki: http://en.wikipedia.org/wiki/Disk_sector, "In disk drives, each physical sector is

[ceph-users] ceph data consistency

2014-09-09 Thread 池信泽
hi, everyone: when I read the filestore.cc, I find the ceph use crc the check the data. Why should check the data? In my knowledge, the disk has error-correcting code (ECC) for each sector. Looking at wiki: http://en.wikipedia.org/wiki/Dis