similar to: method for communication between containers

Dear Daniel, Thank you for your email. According to your suggestion, I tried to use the shared memory filesystem for data exchange between the host machine and the container. The steps are as follows: 1) create an empty file in the host machine (/tmp1/file1). 2) run #chmod 777 /tmp1 and #chmod 777 /tmp1/file1. 3) expose /tmp1 to the container by configuring the container with the following XML

Dear Daniel, As you know, following your suggestion, I can expose shared memory to two containers hosted by the same machine, thus the two containers can exchange data. Now I have a new problem: how does the containers avoid concurrent accesses to the shared memory? In a native system, this can be achieved by using semaphore. But I don't know how the two containers can see the same semaphore.

On Mon, Mar 03, 2014 at 01:39:03PM +0000, WANG Cheng D wrote: > Dear Daniel, > Thank you for your email. > According to your suggestion, I tried to use the shared memory filesystem for data exchange between the host machine and the container. The steps are as follows: > > 1) create an empty file in the host machine (/tmp1/file1). > 2) run #chmod 777 /tmp1 and #chmod 777

we have Redhat 5.5 on server. Recently we tried to use "sleep" command on batch job script some sleep work but some not sleep. any one have ideal? ==== sample program === #/bin/bash set -v program1 sleep 30 program2 sleep 60 program3 sleep 40 ...

llseek requires ocfs2 inode lock for updating the file size in SEEK_END. because the file size maybe update on another node. if it not . after call llseek in SEEK_END. the position is old. this bug can be reproduce the following scenario: at first ,we dd a test fileA,the file size is 10k. on NodeA: --------- 1) open the test fileA, lseek the end of file. and print the position. 2) close the test

Hello! I just started using Linux and I like the possibilities it offers. I'm using Suse Linux (no MS Windows installed at all). I also discovered that syslinux is capable of making a USB pendrive bootable (with graphic menus). This is very nice. Since I'm a Windows user (up until now), I have some questions: 1 - I already downloaded syslinux 3.82 How do I install it on my pen drive

I really don't know how to google this or forum search this question as I have been trying to find the answer for an hour or so. I apologize if it's somewhere on the board spammed a lot but: How do I switch between different running wine apps. Pretty much, how do I use an emulated version of Alt+Tab in Wine? I don't know the hotkey, thanks!

On Thu, Feb 27, 2014 at 06:28:46AM +0000, WANG Cheng D wrote: > Dear all, > In my system, two containers need to exchange data as quick as possible > and the two containers are hosted by the same physical machine, I wonder > if socket is the only method for communication between containers? If you have an area of filesystem that is shared + writable to both containers, they could

Hi, I enable the 'emulate virtual desktop', and run two Windows app same time, how to switch between the two apps? Thanks, Angelo

Hello.. I would like to use different wine versions on the same pc (not at the same time), is it possible in any way? I'm using ubuntu 10.4, no problems in cloning/compiling wine code. Thanks a lot.

Hello all, I saw this question about a year back in the archive[1], but with no final answer. I would like to trace shmget calls and also get the id of the shared memory segment. That script looked like[2], but we dont get the id since arg1 is the errno value. How do i access the shm id, i would need this to debug a customer problem but i don''t have time to learn it the hard

In CentOS 6.7, if I start emacs from a terminal session, I always see a message, "(emacs:{PID}): Gdk-WARNING **: shmget failed: error 28 (No space left on device)" The message is also logged to .xsession-errors, and that occurs regardless of how emacs is started. The same thing occurs with SELinux in permissive mode. Emacs version is emacs-23.1-28.el6.x86_64 . Output from strace

On 09/03/2015 04:00 AM, Nicolas Thierry-Mieg wrote: > On 09/03/2015 03:04 AM, Robert Nichols wrote: >> In CentOS 6.7, if I start emacs from a terminal session, I always see >> a message, "(emacs:{PID}): Gdk-WARNING **: shmget failed: error 28 (No >> space left on device)" >> >> The message is also logged to .xsession-errors, and that occurs >>

I have a machine with fairly much memory 16GB and I get shmget failed: error 28 (No space left on device). It seems that I may be out of shared memory, how do I increase that? $ free total used free shared buffers cached Mem: 14976000 14945552 30448 0 146560 1298908 -/+ buffers/cache: 13500084 1475916 Swap: 18448376

Hi there I’m not quite proficient with libvirt yet, and have been using it so far primarily to manage lxc containers I was hoping to find a means to configure the set of capabilities that guests should drop, but came across a few web pages suggesting these were set in stone in the code is this correct, or is there a means to tweak this set from the host via the xml config or a virsh command ?

Dear all, I have a thirty-party PCIe card in my host which can work properly in native mode. I wonder if this card can be shared by multiple containers. As far as the network interface is concerned, too many efforts have been made for it. Two dedicated cgroup resource schedulers/subsystem(net_cls, net_prio) have been provided at the kernel level, and libvirt has also done a lot of work on

We've been using libvirt based containers under CentOS 7 and everything has been working fine. One application we run in our containers is ctdb, which uses SCHED_FIFO (real time) threads. This has been working without problems until our recent upgrade to CentOS 7.3. For some reason, ctdb is no longer able to create real time threads, and I've tried a simple program myself that

Dear Daniel, The thirty-party PCIe card is based on the Xilinx’ FPGA which is off the shelf, the main features are as follows: 1) x8 Gen3, 8Gb/s per lane/direction 2) MSI and legacy interrupt support 3) Scatter-gather packet DMA engine provide by Northwest Logic We hope multiple Linux Containers to access the PCIe card in time division mode, for example, during slot 1, lxc1 read/write the PCIe

Hi guys, I've been struggling to find a solution to the following issue: I need to change strings in .ini files that are given in input to a program whose output is processed by R. The strings to be changed looks like: "instance = /home/TSPFiles/TSPLIB/berlin52.tsp" I normally use Sed for this kind of things. So, inside R I'd like to write something like: command <-

llseek requires ocfs2 inode lock for updating the file size in SEEK_END. because the file size maybe update on another node. if it not . after call llseek in SEEK_END. the position is old. this bug can be reproduce the following scenario: at first ,we dd a test fileA,the file size is 10k. on NodeA: --------- 1) open the test fileA, lseek the end of file. and print the position. 2) close the test