Re: Best way to use zram in Fedora 21?
Am 13.01.2015 um 10:31 schrieb Karel Zak: On Tue, Dec 09, 2014 at 11:37:25AM +0100, Reindl Harald wrote: any chance to see util-linux v2.26 in F21? Ah sorry, I missed this your question... no problem Well, I'm going to push v2.26-rc1 to rawhide this week, and maybe (depends on feedback) later we can try to upgrade stable release in f21-testing. I usually don't do that and upgrade in rawhide only understandable, the zram features given there are no other regeressions may justify an exception signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Tue, Dec 09, 2014 at 11:37:25AM +0100, Reindl Harald wrote: > any chance to see util-linux v2.26 in F21? Ah sorry, I missed this your question... Well, I'm going to push v2.26-rc1 to rawhide this week, and maybe (depends on feedback) later we can try to upgrade stable release in f21-testing. I usually don't do that and upgrade in rawhide only. Karel -- Karel Zak http://karelzak.blogspot.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 09.12.2014 um 11:24 schrieb Karel Zak: On Mon, Dec 08, 2014 at 11:55:07AM +0100, Dan Horák wrote: On Mon, 8 Dec 2014 11:36:47 +0100 Karel Zak wrote: BTW, util-linux v2.26 (f22) is going to contain new command zramctl(8) $ zramctl --help Usage: lt-zramctl [options] lt-zramctl -r [...] lt-zramctl [options] -f | -s Options: -a, --algorithm lzo|lz4 compression algorithm to use can this work with HW accelerated compressors like the one in IBM Power CPUs? See eg. https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W51a7ffcf4dfd_4b40_9d82_446ebc23c550/page/Build%20F17%20with%20Memory%20Compression Not sure, but it seems that zram currently supports only lzo and lz4 compression backends and boths are pure SW solutions. It does not use IMB nx-compression (kernel ./drivers/crypto/nx/nx-842.c) any chance to see util-linux v2.26 in F21? signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Mon, Dec 08, 2014 at 11:55:07AM +0100, Dan Horák wrote: > On Mon, 8 Dec 2014 11:36:47 +0100 > Karel Zak wrote: > > BTW, util-linux v2.26 (f22) is going to contain new command zramctl(8) > > > > Karel > > > > > > $ zramctl --help > > > > Usage: > > lt-zramctl [options] > > lt-zramctl -r [...] > > lt-zramctl [options] -f | -s > > > > Options: > > -a, --algorithm lzo|lz4 compression algorithm to use > > can this work with HW accelerated compressors like the one in IBM Power > CPUs? See eg. > https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W51a7ffcf4dfd_4b40_9d82_446ebc23c550/page/Build%20F17%20with%20Memory%20Compression Not sure, but it seems that zram currently supports only lzo and lz4 compression backends and boths are pure SW solutions. It does not use IMB nx-compression (kernel ./drivers/crypto/nx/nx-842.c). Karel -- Karel Zak http://karelzak.blogspot.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Mon, 8 Dec 2014 11:36:47 +0100 Karel Zak wrote: > On Tue, Nov 25, 2014 at 09:03:20PM +0100, Juan Orti wrote: > > Hi, I know how to manually configure the zram, but what's the best > > way to do it? > > > > I've seen the unit zram.service of anaconda-core, and it gets > > activated when booting with inst.zram=on, but it looks like very > > anaconda-centric. > > > > Should something like [1] be packaged and included in the distro? or > > maybe we should spin off the anaconda zram.service and do it more > > generic. > > > > I think this is a very interesting feature for memory constrained > > VMs and other devices. > > > > [1] https://github.com/mystilleef/FedoraZram > > > BTW, util-linux v2.26 (f22) is going to contain new command zramctl(8) > > Karel > > > $ zramctl --help > > Usage: > lt-zramctl [options] > lt-zramctl -r [...] > lt-zramctl [options] -f | -s > > Options: > -a, --algorithm lzo|lz4 compression algorithm to use can this work with HW accelerated compressors like the one in IBM Power CPUs? See eg. https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/W51a7ffcf4dfd_4b40_9d82_446ebc23c550/page/Build%20F17%20with%20Memory%20Compression Dan > -b, --bytes print sizes in bytes rather than in human > readable format -f, --findfind a free device > -n, --noheadings don't print headings > -o, --outputcolumns to use for status output > --raw use raw status output format > -r, --reset reset all specified devices > -s, --size device size > -t, --streams number of compression streams > > -h, --help display this help and exit > -V, --version output version information and exit > > Available columns (for --output): > NAME zram device name > DISKSIZE limit on the uncompressed amount of data > DATA uncompressed size of stored data >COMPR compressed size of stored data >ALGORITHM the selected compression algorithm > STREAMS number of concurrent compress operations > ZERO-PAGES empty pages with no allocated memory >TOTAL all memory including allocator fragmentation and > metadata overhead MOUNTPOINT where the device is mounted > > For more details see zramctl(8). > > > > -- > Karel Zak > http://karelzak.blogspot.com > -- > devel mailing list > devel@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/devel > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Tue, Nov 25, 2014 at 09:03:20PM +0100, Juan Orti wrote: > Hi, I know how to manually configure the zram, but what's the best way > to do it? > > I've seen the unit zram.service of anaconda-core, and it gets activated > when booting with inst.zram=on, but it looks like very anaconda-centric. > > Should something like [1] be packaged and included in the distro? or > maybe we should spin off the anaconda zram.service and do it more > generic. > > I think this is a very interesting feature for memory constrained VMs > and other devices. > > [1] https://github.com/mystilleef/FedoraZram BTW, util-linux v2.26 (f22) is going to contain new command zramctl(8) Karel $ zramctl --help Usage: lt-zramctl [options] lt-zramctl -r [...] lt-zramctl [options] -f | -s Options: -a, --algorithm lzo|lz4 compression algorithm to use -b, --bytes print sizes in bytes rather than in human readable format -f, --findfind a free device -n, --noheadings don't print headings -o, --outputcolumns to use for status output --raw use raw status output format -r, --reset reset all specified devices -s, --size device size -t, --streams number of compression streams -h, --help display this help and exit -V, --version output version information and exit Available columns (for --output): NAME zram device name DISKSIZE limit on the uncompressed amount of data DATA uncompressed size of stored data COMPR compressed size of stored data ALGORITHM the selected compression algorithm STREAMS number of concurrent compress operations ZERO-PAGES empty pages with no allocated memory TOTAL all memory including allocator fragmentation and metadata overhead MOUNTPOINT where the device is mounted For more details see zramctl(8). -- Karel Zak http://karelzak.blogspot.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
I recall that multiple zram devices are due to the way the device is handled - there's some need for multiple devices to allow multiple cores to operate concurrently against it. zswap looks interesting. compcache/zram used to be able to setup a backing store that worked like zswap, but was poor performing. I think that if you wanted to eventually persist to disk, then zswap might be the way to go. If you don't want (or don't have) hard swap, then zram. On Fri Nov 28 2014 at 13:41:42 Corey Sheldon wrote: > ok to the naming and multi zram devices questions: > > > 1) one single large space is wasteful if you have your machine up for > longer than a single (or series ) of heavy lifting operations --say you > are rendering a video and then back to the usual grind stuff would you want > all that extra space just wasted ? also say a follow up process is in need > of more would you wanna be stuck on previous values? zram is dynamic in > nature smaller more numerous /dev/zram$i allows for that and in a dynamic > manner... > > > 2) it the RAM its based off not swap and the "z" is known as dynamic > > > Corey W Sheldon > Freelance IT Consultant, Multi-Discipline Tutor > 310.909.7672 > www.facebook.com/1stclassmobileshine > > On Thu, Nov 27, 2014 at 7:39 PM, Reindl Harald > wrote: > >> >> >> Am 28.11.2014 um 01:34 schrieb Zbigniew Jędrzejewski-Szmek: >> >>> On Fri, Nov 28, 2014 at 01:21:26AM +0100, Zbigniew Jędrzejewski-Szmek >>> wrote: >>> On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: > El 2014-11-27 14:48, Reindl Harald escribió: > >> Am 27.11.2014 um 14:25 schrieb Juan Orti: >> >>> Reindl, I'm of the opinion you should upload your scripts to some git >>> repository and package them to be part of the distribution. I can >>> co-maintain if you wish >>> >> >> feel free to package it! >> >> that's why i attached it as i saw the topic >> i am not a active packager on the Fedora infrastrcuture >> > > Ok, I've uploaded the scripts to GitHub and submitted a review request: > > https://github.com/jorti/zram-swap > https://bugzilla.redhat.com/show_bug.cgi?id=1168692 > I have a question about the code: why are multiple swap devices needed? /sys/block/zram0/max_comp_streams can be set to whatever number is wanted. While it might be useful to have additional zram devices for different purposes, I don't think more than one zram swap is useful. If you only have one device, then reloading the module is no longer necessary to change the parameters, since everything else seems to be configurable through sysfs. >>> And another question (sorry, I never used compressed swap before): >>> why not zswap? It seems to be a better fit for the desktop/server >>> environments that Fedora is used for. IIUC, zswap is better because >>> it overflows automatically into the backing swap device >>> >> >> on machines with plenty RAM i prefer not have a swap partition or a swap >> file at all - especially on virtual machines it's a waste of (possible >> expensive SAN) disk storage >> >> on virtual servers currently i prefer zram inside the guest to avoid OOM >> conditions in the guest while the memory compression of the hypervisor >> steps in too late and is more for overcommit the host >> >> >> -- >> devel mailing list >> devel@lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/devel >> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct >> > > -- > devel mailing list > devel@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/devel > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
ok to the naming and multi zram devices questions: 1) one single large space is wasteful if you have your machine up for longer than a single (or series ) of heavy lifting operations --say you are rendering a video and then back to the usual grind stuff would you want all that extra space just wasted ? also say a follow up process is in need of more would you wanna be stuck on previous values? zram is dynamic in nature smaller more numerous /dev/zram$i allows for that and in a dynamic manner... 2) it the RAM its based off not swap and the "z" is known as dynamic Corey W Sheldon Freelance IT Consultant, Multi-Discipline Tutor 310.909.7672 www.facebook.com/1stclassmobileshine On Thu, Nov 27, 2014 at 7:39 PM, Reindl Harald wrote: > > > Am 28.11.2014 um 01:34 schrieb Zbigniew Jędrzejewski-Szmek: > >> On Fri, Nov 28, 2014 at 01:21:26AM +0100, Zbigniew Jędrzejewski-Szmek >> wrote: >> >>> On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: >>> El 2014-11-27 14:48, Reindl Harald escribió: > Am 27.11.2014 um 14:25 schrieb Juan Orti: > >> Reindl, I'm of the opinion you should upload your scripts to some git >> repository and package them to be part of the distribution. I can >> co-maintain if you wish >> > > feel free to package it! > > that's why i attached it as i saw the topic > i am not a active packager on the Fedora infrastrcuture > Ok, I've uploaded the scripts to GitHub and submitted a review request: https://github.com/jorti/zram-swap https://bugzilla.redhat.com/show_bug.cgi?id=1168692 >>> I have a question about the code: why are multiple swap devices needed? >>> /sys/block/zram0/max_comp_streams can be set to whatever number is >>> wanted. While it might be useful to have additional zram devices >>> for different purposes, I don't think more than one zram swap is >>> useful. If you only have one device, then reloading the module is >>> no longer necessary to change the parameters, since everything >>> else seems to be configurable through sysfs. >>> >> And another question (sorry, I never used compressed swap before): >> why not zswap? It seems to be a better fit for the desktop/server >> environments that Fedora is used for. IIUC, zswap is better because >> it overflows automatically into the backing swap device >> > > on machines with plenty RAM i prefer not have a swap partition or a swap > file at all - especially on virtual machines it's a waste of (possible > expensive SAN) disk storage > > on virtual servers currently i prefer zram inside the guest to avoid OOM > conditions in the guest while the memory compression of the hypervisor > steps in too late and is more for overcommit the host > > > -- > devel mailing list > devel@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/devel > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct > -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 28.11.2014 um 01:34 schrieb Zbigniew Jędrzejewski-Szmek: On Fri, Nov 28, 2014 at 01:21:26AM +0100, Zbigniew Jędrzejewski-Szmek wrote: On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: El 2014-11-27 14:48, Reindl Harald escribió: Am 27.11.2014 um 14:25 schrieb Juan Orti: Reindl, I'm of the opinion you should upload your scripts to some git repository and package them to be part of the distribution. I can co-maintain if you wish feel free to package it! that's why i attached it as i saw the topic i am not a active packager on the Fedora infrastrcuture Ok, I've uploaded the scripts to GitHub and submitted a review request: https://github.com/jorti/zram-swap https://bugzilla.redhat.com/show_bug.cgi?id=1168692 I have a question about the code: why are multiple swap devices needed? /sys/block/zram0/max_comp_streams can be set to whatever number is wanted. While it might be useful to have additional zram devices for different purposes, I don't think more than one zram swap is useful. If you only have one device, then reloading the module is no longer necessary to change the parameters, since everything else seems to be configurable through sysfs. And another question (sorry, I never used compressed swap before): why not zswap? It seems to be a better fit for the desktop/server environments that Fedora is used for. IIUC, zswap is better because it overflows automatically into the backing swap device on machines with plenty RAM i prefer not have a swap partition or a swap file at all - especially on virtual machines it's a waste of (possible expensive SAN) disk storage on virtual servers currently i prefer zram inside the guest to avoid OOM conditions in the guest while the memory compression of the hypervisor steps in too late and is more for overcommit the host signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Fri, Nov 28, 2014 at 01:21:26AM +0100, Zbigniew Jędrzejewski-Szmek wrote: > On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: > > El 2014-11-27 14:48, Reindl Harald escribió: > > >Am 27.11.2014 um 14:25 schrieb Juan Orti: > > >>Reindl, I'm of the opinion you should upload your scripts to some git > > >>repository and package them to be part of the distribution. I can > > >>co-maintain if you wish > > > > > >feel free to package it! > > > > > >that's why i attached it as i saw the topic > > >i am not a active packager on the Fedora infrastrcuture > > > > Ok, I've uploaded the scripts to GitHub and submitted a review request: > > > > https://github.com/jorti/zram-swap > > https://bugzilla.redhat.com/show_bug.cgi?id=1168692 > I have a question about the code: why are multiple swap devices needed? > /sys/block/zram0/max_comp_streams can be set to whatever number is > wanted. While it might be useful to have additional zram devices > for different purposes, I don't think more than one zram swap is > useful. If you only have one device, then reloading the module is > no longer necessary to change the parameters, since everything > else seems to be configurable through sysfs. And another question (sorry, I never used compressed swap before): why not zswap? It seems to be a better fit for the desktop/server environments that Fedora is used for. IIUC, zswap is better because it overflows automatically into the backing swap device. Zbyszek -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 28.11.2014 um 01:21 schrieb Zbigniew Jędrzejewski-Szmek: On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: El 2014-11-27 14:48, Reindl Harald escribió: Am 27.11.2014 um 14:25 schrieb Juan Orti: Reindl, I'm of the opinion you should upload your scripts to some git repository and package them to be part of the distribution. I can co-maintain if you wish feel free to package it! that's why i attached it as i saw the topic i am not a active packager on the Fedora infrastrcuture Ok, I've uploaded the scripts to GitHub and submitted a review request: https://github.com/jorti/zram-swap https://bugzilla.redhat.com/show_bug.cgi?id=1168692 I have a question about the code: why are multiple swap devices needed? /sys/block/zram0/max_comp_streams can be set to whatever number is wanted. While it might be useful to have additional zram devices for different purposes, I don't think more than one zram swap is useful. If you only have one device, then reloading the module is no longer necessary to change the parameters, since everything else seems to be configurable through sysfs i admit that i am not really sure, that part found by Google around and maybe that's a relict of zram before it made it to the upstream kernel i guess /sys/block/zram0/max_comp_streams should be set to the number of CPU's and i ask my self why the default is 1 instead number of cores signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Thu, Nov 27, 2014 at 04:42:36PM +0100, Juan Orti wrote: > El 2014-11-27 14:48, Reindl Harald escribió: > >Am 27.11.2014 um 14:25 schrieb Juan Orti: > >>Reindl, I'm of the opinion you should upload your scripts to some git > >>repository and package them to be part of the distribution. I can > >>co-maintain if you wish > > > >feel free to package it! > > > >that's why i attached it as i saw the topic > >i am not a active packager on the Fedora infrastrcuture > > Ok, I've uploaded the scripts to GitHub and submitted a review request: > > https://github.com/jorti/zram-swap > https://bugzilla.redhat.com/show_bug.cgi?id=1168692 I have a question about the code: why are multiple swap devices needed? /sys/block/zram0/max_comp_streams can be set to whatever number is wanted. While it might be useful to have additional zram devices for different purposes, I don't think more than one zram swap is useful. If you only have one device, then reloading the module is no longer necessary to change the parameters, since everything else seems to be configurable through sysfs. Zbyszek -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
El 2014-11-27 14:48, Reindl Harald escribió: Am 27.11.2014 um 14:25 schrieb Juan Orti: Reindl, I'm of the opinion you should upload your scripts to some git repository and package them to be part of the distribution. I can co-maintain if you wish feel free to package it! that's why i attached it as i saw the topic i am not a active packager on the Fedora infrastrcuture Ok, I've uploaded the scripts to GitHub and submitted a review request: https://github.com/jorti/zram-swap https://bugzilla.redhat.com/show_bug.cgi?id=1168692 -- Juan Orti https://miceliux.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 27.11.2014 um 14:25 schrieb Juan Orti: El 2014-11-27 11:24, Reindl Harald escribió: Am 27.11.2014 um 11:15 schrieb Vratislav Podzimek: On Wed, 2014-11-26 at 16:27 -0500, Corey Sheldon wrote: Juan no needinst.zram=on on install on first boot modprobe zram ; systemctl start zramvoila I use the default one in f21b no issues For now. But the anaconda's zram.service is tailored to provide zram swap for the installation process. Future changes in it may make it unusable for general purpose usage on an installed system. So packaging something general-purpose it definitely the right way to go. Reindl's scripts look good to me, I'd just suggest adding a configuration option for setting the maximum RAM for the zram swap being created. It doesn't make much sense to use it on systems with e.g. 32 GiB of RAM. That's by the way one of the tweaks the anaconda's version of the scripts+service has (hardcoded, though) "my script" supports a "percent of total RAM config" which i don't ship with the RPM because it's meant for internal usage (it's BTW a result of Google around after face the zram module with new kernels, took existing snippets from several sources, made them easier, fixed some bugs and introduced the systemd-unit) [root@mail-gw:~]$ cat /etc/sysconfig/zram FACTOR=15 Reindl, I'm of the opinion you should upload your scripts to some git repository and package them to be part of the distribution. I can co-maintain if you wish feel free to package it! that's why i attached it as i saw the topic i am not a active packager on the Fedora infrastrcuture signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
El 2014-11-27 11:24, Reindl Harald escribió: Am 27.11.2014 um 11:15 schrieb Vratislav Podzimek: On Wed, 2014-11-26 at 16:27 -0500, Corey Sheldon wrote: Juan no needinst.zram=on on install on first boot modprobe zram ; systemctl start zramvoila I use the default one in f21b no issues For now. But the anaconda's zram.service is tailored to provide zram swap for the installation process. Future changes in it may make it unusable for general purpose usage on an installed system. So packaging something general-purpose it definitely the right way to go. Reindl's scripts look good to me, I'd just suggest adding a configuration option for setting the maximum RAM for the zram swap being created. It doesn't make much sense to use it on systems with e.g. 32 GiB of RAM. That's by the way one of the tweaks the anaconda's version of the scripts+service has (hardcoded, though) "my script" supports a "percent of total RAM config" which i don't ship with the RPM because it's meant for internal usage (it's BTW a result of Google around after face the zram module with new kernels, took existing snippets from several sources, made them easier, fixed some bugs and introduced the systemd-unit) [root@mail-gw:~]$ cat /etc/sysconfig/zram FACTOR=15 sion.html Reindl, I'm of the opinion you should upload your scripts to some git repository and package them to be part of the distribution. I can co-maintain if you wish. -- Juan Orti https://miceliux.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 27.11.2014 um 11:15 schrieb Vratislav Podzimek: On Wed, 2014-11-26 at 16:27 -0500, Corey Sheldon wrote: Juan no needinst.zram=on on install on first boot modprobe zram ; systemctl start zramvoila I use the default one in f21b no issues For now. But the anaconda's zram.service is tailored to provide zram swap for the installation process. Future changes in it may make it unusable for general purpose usage on an installed system. So packaging something general-purpose it definitely the right way to go. Reindl's scripts look good to me, I'd just suggest adding a configuration option for setting the maximum RAM for the zram swap being created. It doesn't make much sense to use it on systems with e.g. 32 GiB of RAM. That's by the way one of the tweaks the anaconda's version of the scripts+service has (hardcoded, though) "my script" supports a "percent of total RAM config" which i don't ship with the RPM because it's meant for internal usage (it's BTW a result of Google around after face the zram module with new kernels, took existing snippets from several sources, made them easier, fixed some bugs and introduced the systemd-unit) [root@mail-gw:~]$ cat /etc/sysconfig/zram FACTOR=15 "It doesn't make much sense to use it on systems with e.g. 32 GiB of RAM" depends on the context - on a host mostly used for a lot of virtual machines it makes sense even with 64 GB or more - depends on the total count of guests and how much RAM they have assigend instead have zram on all of the guests and to prevent danger of OOM events they may have all 2-3 GB RAM and while overcommit the host that way it can swap out most unsed guest memory without fall back to slow disk swapping VMware ESXi does something similar for years to overcommit hosts http://pubs.vmware.com/vsphere-4-esx-vcenter/index.jsp?topic=/com.vmware.vsphere.resourcemanagement.doc_41/managing_memory_resources/c_memory_compression.html signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Wed, 2014-11-26 at 23:46 +0100, Nicolas Chauvet wrote: > > > 2014-11-26 22:27 GMT+01:00 Corey Sheldon : > Juan no needinst.zram=on on install on first boot > modprobe zram ; systemctl start zramvoila I use the > default one in f21b no issues > > > > Corey, > > Why this service is part of anaconda-core ? and not with the base > systemd or else ? Because it is not a general-purpose service. It is a tailored version of service+scripts for use in the installation process. -- Vratislav Podzimek Anaconda Rider | Red Hat, Inc. | Brno - Czech Republic -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
On Wed, 2014-11-26 at 16:27 -0500, Corey Sheldon wrote: > Juan no needinst.zram=on on install on first boot modprobe > zram ; systemctl start zramvoila I use the default one in f21b > no issues For now. But the anaconda's zram.service is tailored to provide zram swap for the installation process. Future changes in it may make it unusable for general purpose usage on an installed system. So packaging something general-purpose it definitely the right way to go. Reindl's scripts look good to me, I'd just suggest adding a configuration option for setting the maximum RAM for the zram swap being created. It doesn't make much sense to use it on systems with e.g. 32 GiB of RAM. That's by the way one of the tweaks the anaconda's version of the scripts+service has (hardcoded, though). -- Vratislav Podzimek Anaconda Rider | Red Hat, Inc. | Brno - Czech Republic -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
2014-11-26 22:27 GMT+01:00 Corey Sheldon : > Juan no needinst.zram=on on install on first boot modprobe zram ; > systemctl start zramvoila I use the default one in f21b no issues > Corey, Why this service is part of anaconda-core ? and not with the base systemd or else ? On my installed workstation system, I can remove anaconda that is now undeeded but I would like to keep zram.service installed. Thx for your answear. Nicolas Chauvet -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Juan no needinst.zram=on on install on first boot modprobe zram ; systemctl start zramvoila I use the default one in f21b no issues Corey W Sheldon Freelance IT Consultant, Multi-Discipline Tutor 310.909.7672 www.facebook.com/1stclassmobileshine On Wed, Nov 26, 2014 at 4:08 AM, Juan Orti wrote: > El 2014-11-25 21:07, Reindl Harald escribió: > > Am 25.11.2014 um 21:03 schrieb Juan Orti: >> >>> Hi, I know how to manually configure the zram, but what's the best way >>> to do it? >>> >>> I've seen the unit zram.service of anaconda-core, and it gets activated >>> when booting with inst.zram=on, but it looks like very anaconda-centric. >>> >>> Should something like [1] be packaged and included in the distro? or >>> maybe we should spin off the anaconda zram.service and do it more >>> generic. >>> >>> I think this is a very interesting feature for memory constrained VMs >>> and other devices. >>> >>> [1] https://github.com/mystilleef/FedoraZram >>> >> >> i am using the attached src.rpm for many months on Fedora (F19, F20) >> > > Thank you, works great. Shouldn't we package this for the distro? > > -- > Juan Orti > https://miceliux.com > -- > devel mailing list > devel@lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/devel > Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
El 2014-11-25 21:07, Reindl Harald escribió: Am 25.11.2014 um 21:03 schrieb Juan Orti: Hi, I know how to manually configure the zram, but what's the best way to do it? I've seen the unit zram.service of anaconda-core, and it gets activated when booting with inst.zram=on, but it looks like very anaconda-centric. Should something like [1] be packaged and included in the distro? or maybe we should spin off the anaconda zram.service and do it more generic. I think this is a very interesting feature for memory constrained VMs and other devices. [1] https://github.com/mystilleef/FedoraZram i am using the attached src.rpm for many months on Fedora (F19, F20) Thank you, works great. Shouldn't we package this for the distro? -- Juan Orti https://miceliux.com -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Re: Best way to use zram in Fedora 21?
Am 25.11.2014 um 21:03 schrieb Juan Orti: Hi, I know how to manually configure the zram, but what's the best way to do it? I've seen the unit zram.service of anaconda-core, and it gets activated when booting with inst.zram=on, but it looks like very anaconda-centric. Should something like [1] be packaged and included in the distro? or maybe we should spin off the anaconda zram.service and do it more generic. I think this is a very interesting feature for memory constrained VMs and other devices. [1] https://github.com/mystilleef/FedoraZram i am using the attached src.rpm for many months on Fedora (F19, F20) zram-1.0.1-1.fc20.20141120.rh.src.rpm Description: application/rpm signature.asc Description: OpenPGP digital signature -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
Best way to use zram in Fedora 21?
Hi, I know how to manually configure the zram, but what's the best way to do it? I've seen the unit zram.service of anaconda-core, and it gets activated when booting with inst.zram=on, but it looks like very anaconda-centric. Should something like [1] be packaged and included in the distro? or maybe we should spin off the anaconda zram.service and do it more generic. I think this is a very interesting feature for memory constrained VMs and other devices. [1] https://github.com/mystilleef/FedoraZram signature.asc Description: This is a digitally signed message part -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
