The problem with limited number of snapshots is caused by the using big common mempool in dm-io module. (This can happen even you have a lot of free memory...) There are new dm-io patches which introduce new dm-io interface (using private mempools) and solving this type of snapshot limitation. Patches are currently in review and will probably change a bit, but I hope it will in 2.6.19 kernel. Milan -- mbroz@xxxxxxxxxx The MoonSeeker napsal(a): > Yes I really need it. I have to create a virtual network editor for my > diploma project. So I have found many virtual solutions but the bestest > for our project is OpenVZ. Unfortunatly, OpenVZ don't offer the copy on > write with his solution, after many tests, I have found a solution based > on LVM. > > The main idea is to have a Virtual Private Server Core and lot of > Virtual Private Server who are a snapshot of the Virtual Server Core. > Now the problem is the limitation of VLM, I need more than 32 servers > (32 snapshots). Will this limitation incresed in futur futur released of > LVM? Or can we broke this limitation? > > Have you a solution, it's relly urgent for me... > > Thanks you > > > Le 26 sept. 06 à 23:14, Jan Blunck a écrit : > >> On Tue, Sep 26, The MoonSeeker wrote: >> >>> I'd like to create many snaphot of an image but I've got when I >>> attemp to create the 32th snapshot : >>> >>> root@B03:/diplome# lvcreate -s -L150M -n 232 /dev/openvz/vps-core >>> Rounding up size to full physical extent 152.00 MB >>> device-mapper: reload ioctl failed: Ne peut allouer de la mémoire >>> Failed to suspend origin vps-core >>> >>> I don't understand the error.. >> >> I'm not a native french speaker (hint!) but I assume you run out of >> memory. >> >> Yes there are limitations to the number of snapshots. For every single >> snapshot we have to allocate memory for copying the chunks to the >> exception >> store. >> >> Do you really need that many snapshots at the same time? >> >> -- >> dm-devel mailing list >> dm-devel@xxxxxxxxxx >> https://www.redhat.com/mailman/listinfo/dm-devel > > > -- > dm-devel mailing list > dm-devel@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/dm-devel -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
