[ceph-users] Re: Question about per MDS journals

2021-02-25 Thread John Spray
Quite right, I flipped them while writing the mail - oops. John On Thu, Feb 25, 2021 at 6:04 PM Mykola Golub wrote: > > On Thu, Feb 25, 2021 at 09:59:41AM +, John Spray wrote: > > osdc/Journaler is for RDB, client/Journaler is for CephFS. > > Actually, src/journal/(Journaler.h) is for RBD (i

[ceph-users] Re: Question about per MDS journals

2021-02-25 Thread Mykola Golub
On Thu, Feb 25, 2021 at 09:59:41AM +, John Spray wrote: > osdc/Journaler is for RDB, client/Journaler is for CephFS. Actually, src/journal/(Journaler.h) is for RBD (it is more generic, but currently is used by RBD only). And src/osdc/Journaler.h is for cephfs. > > > On Thu, Feb 25, 2021 at

[ceph-users] Re: Question about per MDS journals

2021-02-25 Thread John Spray
osdc/Journaler is for RDB, client/Journaler is for CephFS. On Thu, Feb 25, 2021 at 8:26 AM 조규진 wrote: > > Hi, John. > > Thanks for your kind reply! > > While i'm checking the code that you recommend to check and other .cc files > about journal, I find that there is two Journaler class. > One is

[ceph-users] Re: Question about per MDS journals

2021-02-24 Thread John Spray
On Wed, Feb 24, 2021 at 9:10 AM 조규진 wrote: > > Hi. > > I'm a newbie in CephFS and I have some questions about how per-MDS journals > work. > In Sage's paper (osdi '06), I read that each MDSs has its own journal and > it lazily flushes metadata modifications on OSD cluster. > What I'm wondering is