Kim, Actually we are using qpid as part of our application, and customer is using my application. They are facing this issue and it is happening to them intermittently but still don't know at what scenario it is happening. I was trying the same application with NFS but still couldn't reproduce it. We took tcpdump and i see that tcp trace doesn't have full message and it is getting truncate before broker getting close the tcp connection.
Thanks, Ram On Fri, Nov 16, 2018 at 8:33 AM Kim van der Riet <[email protected]> wrote: > Did you find a reproducer at all? > > Kim > > On 11/12/18 11:43 AM, rammohan ganapavarapu 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] > >> > >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
