Thank you so much for answer. To clarify my question :
*If we start multiple containers that use the same image, the rootfs (or any file inside the image) is only stored once. When the container is started, a "writable layer" is created for each container, which will contain filesystem changes that are made in each individual container. * Is this is done with lxc or not ? 2018-06-10 13:00 GMT+01:00 <lxc-users-requ...@lists.linuxcontainers.org>: > Send lxc-users mailing list submissions to > lxc-users@lists.linuxcontainers.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.linuxcontainers.org/listinfo/lxc-users > or, via email, send a message with subject or body 'help' to > lxc-users-requ...@lists.linuxcontainers.org > > You can reach the person managing the list at > lxc-users-ow...@lists.linuxcontainers.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of lxc-users digest..." > > Today's Topics: > > 1. Re: lxc-users Digest, Vol 233, Issue 11 (Thouraya TH) > 2. Re: lxc-users Digest, Vol 233, Issue 11 (Michel Jansens) > > > ---------- Message transféré ---------- > From: Thouraya TH <thouray...@gmail.com> > To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org>, > stgra...@ubuntu.com > Cc: > Bcc: > Date: Sat, 9 Jun 2018 13:56:28 +0100 > Subject: Re: [lxc-users] lxc-users Digest, Vol 233, Issue 11 > Thank you for answer. > Example > lxc-create -n c1 -o ubuntu > i don't mean ubuntu image > > I mean these files: > > Example: > > root@graphene-14:/var/lib/lxc/graphene-14-worker1# ls > > config fstab rootfs > > > These folders content > config fstab rootfs are the same for the three containers on the same > host ? > it's up to me to use a deduplication solution ? That's it ? > Bests. > > > 2018-06-09 13:00 GMT+01:00 <lxc-users-requ...@lists.linuxcontainers.org>: > >> Send lxc-users mailing list submissions to >> lxc-users@lists.linuxcontainers.org >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://lists.linuxcontainers.org/listinfo/lxc-users >> or, via email, send a message with subject or body 'help' to >> lxc-users-requ...@lists.linuxcontainers.org >> >> You can reach the person managing the list at >> lxc-users-ow...@lists.linuxcontainers.org >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of lxc-users digest..." >> >> Today's Topics: >> >> 1. Re: Question : duplication (Stéphane Graber) >> 2. Howto see actually used IPv6 (*not* link local) with lxc list >> (v3.0.0)? (Oliver Rath) >> >> >> ---------- Message transféré ---------- >> From: "Stéphane Graber" <stgra...@ubuntu.com> >> To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org> >> Cc: >> Bcc: >> Date: Fri, 8 Jun 2018 11:30:07 -0400 >> Subject: Re: [lxc-users] Question : duplication >> On Fri, Jun 08, 2018 at 12:13:34PM +0100, Thouraya TH wrote: >> > Hi, >> > >> > In my cluster, i have 3 containers per host and i have 10 hosts. >> > all containers are ubuntu containers. >> > My question: the rootfs of these containers are the same ? >> > i have duplicated files in different containers repository ? >> > >> > >> > >> > Thank you so much for answers. >> > Best regards. >> >> Depends on your storage backend, all backends except the directory one >> will use copy-on-write for deltas from the image used for the container >> and their current state. >> >> If using ZFS and have quite a bit of spare RAM you can also turn on >> deduplication on your ZPOOL which will then deduplicate writes as they >> happen, possibly saving you a lot of disk space. >> >> >> -- >> Stéphane Graber >> Ubuntu developer >> http://www.ubuntu.com >> >> >> ---------- Message transféré ---------- >> From: Oliver Rath <r...@mglug.de> >> To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org> >> Cc: >> Bcc: >> Date: Sat, 9 Jun 2018 13:47:16 +0200 >> Subject: [lxc-users] Howto see actually used IPv6 (*not* link local) with >> lxc list (v3.0.0)? >> Hi list, >> >> Im using IPv6 in several lxc environments. Is there a possibility to see >> the actual set IPv6-Adresses (coming from radvd) in the list command? >> Ive tried >> >> lxc list --columns="n",user.net.0.ipv6.address >> >> with no luck (field leaves empty), but >> >> # lxc list --columns="n",net.0.ipv6.address >> Error: Invalid config key 'net.0.ipv6.address' in 'net.0.ipv6.address' >> >> gives an error. Unfortunatly I didnt found any hint whats the key name >> for getting this information. >> >> What can I do? >> >> Tfh! >> >> Oliver >> >> >> >> >> _______________________________________________ >> lxc-users mailing list >> lxc-users@lists.linuxcontainers.org >> http://lists.linuxcontainers.org/listinfo/lxc-users >> > > > > ---------- Message transféré ---------- > From: Michel Jansens <michel.jans...@ulb.ac.be> > To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org> > Cc: > Bcc: > Date: Sun, 10 Jun 2018 00:08:39 +0200 > Subject: Re: [lxc-users] lxc-users Digest, Vol 233, Issue 11 > Hi Oliver, > > I think I don’t completely understand what you mean, but I can say, if you > use a ZFS storage, lxc init , or lxc copy your are creating ZFS clones > (meaning sharing the data blocks, planned reduplication). > If you want new blocks to be deduplicated, you must activate > reduplication, but this will come at a cost: the system has to make a table > of hashes, and for each write, check in that table if a block already has > the same hash. It you don’t have enough memory, this happens on disk, > meaning one write can generate many reads… > You could also use extra data volumes and clone them through "zfs clone” > instruction (for dev-test-prod environments). > > From all I’ve read, if you want to activate deduplication, you better have > lots of RAM. > > Cheers, > > Michel > > > On 9 Jun 2018, at 14:56, Thouraya TH <thouray...@gmail.com> wrote: > > Thank you for answer. > Example > lxc-create -n c1 -o ubuntu > i don't mean ubuntu image > > I mean these files: > > Example: > > root@graphene-14:/var/lib/lxc/graphene-14-worker1# ls > > config fstab rootfs > > > These folders content > config fstab rootfs are the same for the three containers on the same > host ? > it's up to me to use a deduplication solution ? That's it ? > Bests. > > > 2018-06-09 13:00 GMT+01:00 <lxc-users-requ...@lists.linuxcontainers.org>: > >> Send lxc-users mailing list submissions to >> lxc-users@lists.linuxcontainers.org >> >> To subscribe or unsubscribe via the World Wide Web, visit >> http://lists.linuxcontainers.org/listinfo/lxc-users >> or, via email, send a message with subject or body 'help' to >> lxc-users-requ...@lists.linuxcontainers.org >> >> You can reach the person managing the list at >> lxc-users-ow...@lists.linuxcontainers.org >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of lxc-users digest..." >> >> Today's Topics: >> >> 1. Re: Question : duplication (Stéphane Graber) >> 2. Howto see actually used IPv6 (*not* link local) with lxc list >> (v3.0.0)? (Oliver Rath) >> >> >> ---------- Message transféré ---------- >> From: "Stéphane Graber" <stgra...@ubuntu.com> >> To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org> >> Cc: >> Bcc: >> Date: Fri, 8 Jun 2018 11:30:07 -0400 >> Subject: Re: [lxc-users] Question : duplication >> On Fri, Jun 08, 2018 at 12:13:34PM +0100, Thouraya TH wrote: >> > Hi, >> > >> > In my cluster, i have 3 containers per host and i have 10 hosts. >> > all containers are ubuntu containers. >> > My question: the rootfs of these containers are the same ? >> > i have duplicated files in different containers repository ? >> > >> > >> > >> > Thank you so much for answers. >> > Best regards. >> >> Depends on your storage backend, all backends except the directory one >> will use copy-on-write for deltas from the image used for the container >> and their current state. >> >> If using ZFS and have quite a bit of spare RAM you can also turn on >> deduplication on your ZPOOL which will then deduplicate writes as they >> happen, possibly saving you a lot of disk space. >> >> >> -- >> Stéphane Graber >> Ubuntu developer >> http://www.ubuntu.com >> >> >> ---------- Message transféré ---------- >> From: Oliver Rath <r...@mglug.de> >> To: LXC users mailing-list <lxc-users@lists.linuxcontainers.org> >> Cc: >> Bcc: >> Date: Sat, 9 Jun 2018 13:47:16 +0200 >> Subject: [lxc-users] Howto see actually used IPv6 (*not* link local) with >> lxc list (v3.0.0)? >> Hi list, >> >> Im using IPv6 in several lxc environments. Is there a possibility to see >> the actual set IPv6-Adresses (coming from radvd) in the list command? >> Ive tried >> >> lxc list --columns="n",user.net.0.ipv6.address >> >> with no luck (field leaves empty), but >> >> # lxc list --columns="n",net.0.ipv6.address >> Error: Invalid config key 'net.0.ipv6.address' in 'net.0.ipv6.address' >> >> gives an error. Unfortunatly I didnt found any hint whats the key name >> for getting this information. >> >> What can I do? >> >> Tfh! >> >> Oliver >> >> >> >> >> _______________________________________________ >> lxc-users mailing list >> lxc-users@lists.linuxcontainers.org >> http://lists.linuxcontainers.org/listinfo/lxc-users >> > > _______________________________________________ > lxc-users mailing list > lxc-users@lists.linuxcontainers.org > http://lists.linuxcontainers.org/listinfo/lxc-users > > > > _______________________________________________ > lxc-users mailing list > lxc-users@lists.linuxcontainers.org > http://lists.linuxcontainers.org/listinfo/lxc-users >
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