yes, the question here is, librbd use the committed callback, as my understanding, when this callback returned, librbd write will be looked as completed. So I can issue a read IO even if the data is not readable. In this case, i would like to know what data will be returned for the read IO?
2015-12-31 10:29 GMT+08:00 Dong Wu <archer.wud...@gmail.com>: > there are two callbacks: committed and applied, committed means write > to all replica's journal, applied means write to all replica's file > system. so when applied callback return to client, it means data can > be read. > > 2015-12-31 10:15 GMT+08:00 min fang <louisfang2...@gmail.com>: > > Hi, as my understanding, write IO will committed data to journal firstly, > > then give a safe callback to ceph client. So it is possible that data > still > > in journal when I send a read IO to the same area. So what data will be > > returned if the new data still in journal? > > > > Thanks. > > > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > >
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