Any one point me to the doc where i can read internals about how linearstore works and how qpid uses it?
Thanks, Ram On Mon, Nov 12, 2018 at 8:43 AM rammohan ganapavarapu < [email protected]> wrote: > 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] >> >>
