Kim, Thanks for clearing that up for me, does it support SAN storage blocks. Where can i read more about linearstore if i want to know the low level internals?
Ram On Mon, Nov 12, 2018 at 8:32 AM Kim van der Riet <[email protected]> wrote: > The linearstore relies on using libaio for its async disk writes. The > O_DIRECT flag is used, and this requires a block of aligned memory to > serve as a memory buffer for disk write operations. To my knowledge, > this technique only works with local disks and controllers. NFS does not > allow for DMA memory writes to disk AFAIK, and for as long as I can > remember, has been a problem for the linearstore. With some work it > might be possible to make it work using another write technique though. > NFS has never been a "supported" medium for linearstore. > > On 11/9/18 4:28 PM, rammohan ganapavarapu wrote: > > But how does NFS will cause this issue, i am interested to see because we > > are using NFS (V4 version) in some environments, so wanted to learn > tunings > > when we use NFS. > > > > Thanks, > > Ram > > > > On Fri, Nov 9, 2018 at 6:48 AM rammohan ganapavarapu < > > [email protected]> wrote: > > > >> Sorry, i thought it's NFS but it's actually SAN storage volume. > >> > >> Thanks, > >> Ram > >> > >> On Fri, Nov 9, 2018, 2:10 AM Gordon Sim <[email protected] wrote: > >> > >>> On 08/11/18 16:56, rammohan ganapavarapu wrote: > >>>> I was wrong about the NFS for qpid journal files, looks like they are > on > >>>> NFS, so does NFS cause this issue? > >>> Yes, I believe it does. What version of NFS are you using? > >>> > >>> --------------------------------------------------------------------- > >>> To unsubscribe, e-mail: [email protected] > >>> For additional commands, e-mail: [email protected] > >>> > >>> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
