On 06/08/2010 07:55 AM, Nirmal Guhan wrote: > On Mon, Jun 7, 2010 at 5:21 PM, Brian K. White<br...@aljex.com> wrote: > > >> On 6/7/2010 7:51 PM, Nirmal Guhan wrote: >> >>> Hi, >>> >>> Is there a way to use shared memory between the containers? Any other >>> better/faster IPC mechanisms? I don't want to use sockets. >>> >>> Please let me know. >>> >> Fifos on shared filesystem on the host? >> Multiply hardlinked files on the host which appear in the same place in >> each container? >> >> Except I don't know how you could safely allow more than one client >> mount the fs except read-only, other than by means which are ultimately >> sockets just with fs overhead on top of that. (various network and >> distributed filesystems, and distributed ipc, distributed locking >> systems, all are network based) >> >> Or if the multiple-hardlink idea doesn't actually work, I guess you >> could put an incron job on the host which has access to all the >> container's fs's and can watch a special directory in the same place in >> all containers fs's and whenever a file is modified in one container, >> incrond on the host notices and replicates it in all other containers. >> >> None of this sounds as good as ordinary socket communications, which is >> my point. >> >> The whole point of a container is to ensure that exactly that (IPC) >> can't happen so I am tempted to say if you don't want something which >> contains, then don't use containers. >> >> -- >> bkw >> >> >> > I would prefer using the RAM for performance, something like /dev/shm. I > tried mounting /dev/shm of host on container using mount --bind and it > works. I don't know if this is preferable though. Is there a similar > implementation(to /dev/shm) that is more secure and can be used across > containers? Or anything on the cards? > If you share the filesystem, you can use a shared mapped file (this is what does posix shm in the /dev/shm location in fact).
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