 |
 |
Correct! That's what has to get fixed. However, there is no point in doing this if the majority of a vector read hits individual pages. We need to understand the vector read before deciding where to apply limited effort. Enabling AIO would do nothing as Ceph AIO reverts to synchrnous I/O. On Mon, 10 Aug 2020, Matev? Tadel wrote: > Thanks! The problem is that XrdCephOssFile does not implement ReadV at all and so it gets serialized at the parent class level, right? > > Also, Read() always calls ceph_posix_pread() which only handles one block at a time and so requires two calls if the request is straddling two ceph blocks. > > Would enabling AIO help here? It seems to be implemented there. > > > > -- > You are receiving this because you were mentioned. > Reply to this email directly or view it on GitHub: > https://github.com/xrootd/xrootd/issues/1259#issuecomment-671535681 -- You are receiving this because you were mentioned. Reply to this email directly or view it on GitHub: https://github.com/xrootd/xrootd/issues/1259#issuecomment-671537896 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-DEV list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-DEV&A=1