[GitHub] [cloudstack-documentation] rhtyd commented on pull request #182: add nodejs as dependency for building from source
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[GitHub] [cloudstack-documentation] ACSGitBot commented on pull request #182: add nodejs as dependency for building from source
ACSGitBot commented on pull request #182: URL: https://github.com/apache/cloudstack-documentation/pull/182#issuecomment-764610339 This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
Re: Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint)
Well, there you go.. On 2021-01-21 18:50, Simon Weller wrote: We used to use CLVM a while ago before we shifted to Ceph. Cluster suite/corosync was a bit of a nightmare, and fencing events caused all sorts of locking (DLM) problems. I helped a CloudStack user out a couple of month ago, after they upgraded and CLVM broke, so I know it's still out there in limited places. I wouldn't recommend using it today unless you're very brave and have the capability of troubleshooting the code yourself. In addition: I assume you used CLVM with Corosync? Yes My concern with LVM is: - No thin provisioning (when used with CloudStack) Indeed and machine deployment meant a qemu-img convert qcow2 -> lv .. so lengthy. - No snapshots (Right?) Don't remember honestly. If there were, they must have been slow. - Not very much used Yep.. OCFS starts to become more appealing. :) At the time - and probably now as well - OCFS was best supported by Oracle Unbreakable Linux (RHEL rebuild), might be worth looking at running that instead of Ubuntu or CentOS, hopefully a smoother, bug-free experience. Lucian
Re: Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint)
We used to use CLVM a while ago before we shifted to Ceph. Cluster suite/corosync was a bit of a nightmare, and fencing events caused all sorts of locking (DLM) problems. I helped a CloudStack user out a couple of month ago, after they upgraded and CLVM broke, so I know it's still out there in limited places. I wouldn't recommend using it today unless you're very brave and have the capability of troubleshooting the code yourself. -Si From: Wido den Hollander Sent: Thursday, January 21, 2021 11:26 AM To: dev@cloudstack.apache.org ; n...@li.nux.ro Cc: us...@cloudstack.apache.org Subject: Re: Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint) On 21/01/2021 11:34, n...@li.nux.ro wrote: > Hi, > > I used SharedMountPoint a very long time ago with GlusterFS before > Cloudstack had native integration. > Don't remember the details, but overall my impression was that it worked > surprisingly well, of course back then there weren't as many feature, so > less stuff to test. I would give it a go. > > As a side note, I did also use iSCSI with CLVM with success, it was > quite fast. I ended up doing it because it was difficult to get OCFS > running on EL6 and GFS2 had a reputation for being very slow. Marcus has > a lot of experience with this, might want to get in touch with him: > https://www.slideshare.net/MarcusLSorensen/cloud-stack-clvm I assume you used CLVM with Corosync? My concern with LVM is: - No thin provisioning (when used with CloudStack) - No snapshots (Right?) - Not very much used OCFS2 doesn't have my preference either, but otherwise you have to use corosync. Anybody else otherwise using CLVM? Wido > > HTH, > Lucian > > On 2021-01-21 09:32, Wido den Hollander wrote: >> Hi, >> >> For a specific use-case I'm looking into the possibility to use iSCSI >> in combination with KVM. >> >> Use-case: Low-latenc I/O with 4k blocks and QD=1 >> >> KVM with CloudStack doesn't support iSCSI natively and the docs and >> other blogs refer to using 'SharedMountPoint' with OCFS2 or GFS2: >> >> - >> http://docs.cloudstack.apache.org/en/latest/adminguide/storage.html#hypervisor-support-for-primary-storage >> >> - >> https://www.shapeblue.com/installing-and-configuring-an-ocfs2-clustered-file-system/ >> >> >> It has been a really long time since I've used OCFS2 and I wanted to >> see what experiences from other people are. >> >> How is the stability and performance of OFCS2? It seems that >> performance should be rather good as lock/s is a problem with >> clustered filesystems, but since we only lock the QCOW2 file on boot >> of the VM that shouldn't be an issue. >> >> In addition to OCFS2, how mature is 'SharedMountPoint' as a storage >> pool with KVM. Does is support all the features NFS supports? >> >> Thanks, >> >> Wido
Re: Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint)
On 21/01/2021 11:34, n...@li.nux.ro wrote: Hi, I used SharedMountPoint a very long time ago with GlusterFS before Cloudstack had native integration. Don't remember the details, but overall my impression was that it worked surprisingly well, of course back then there weren't as many feature, so less stuff to test. I would give it a go. As a side note, I did also use iSCSI with CLVM with success, it was quite fast. I ended up doing it because it was difficult to get OCFS running on EL6 and GFS2 had a reputation for being very slow. Marcus has a lot of experience with this, might want to get in touch with him: https://www.slideshare.net/MarcusLSorensen/cloud-stack-clvm I assume you used CLVM with Corosync? My concern with LVM is: - No thin provisioning (when used with CloudStack) - No snapshots (Right?) - Not very much used OCFS2 doesn't have my preference either, but otherwise you have to use corosync. Anybody else otherwise using CLVM? Wido HTH, Lucian On 2021-01-21 09:32, Wido den Hollander wrote: Hi, For a specific use-case I'm looking into the possibility to use iSCSI in combination with KVM. Use-case: Low-latenc I/O with 4k blocks and QD=1 KVM with CloudStack doesn't support iSCSI natively and the docs and other blogs refer to using 'SharedMountPoint' with OCFS2 or GFS2: - http://docs.cloudstack.apache.org/en/latest/adminguide/storage.html#hypervisor-support-for-primary-storage - https://www.shapeblue.com/installing-and-configuring-an-ocfs2-clustered-file-system/ It has been a really long time since I've used OCFS2 and I wanted to see what experiences from other people are. How is the stability and performance of OFCS2? It seems that performance should be rather good as lock/s is a problem with clustered filesystems, but since we only lock the QCOW2 file on boot of the VM that shouldn't be an issue. In addition to OCFS2, how mature is 'SharedMountPoint' as a storage pool with KVM. Does is support all the features NFS supports? Thanks, Wido
[GitHub] [cloudstack-documentation] ACSGitBot commented on pull request #182: add nodejs as dependency for building from source
ACSGitBot commented on pull request #182: URL: https://github.com/apache/cloudstack-documentation/pull/182#issuecomment-764611375 Build finished. You can review it at: https://acs-www.shapeblue.com/docs/WIP-PROOFING/pr182// Build Log Output: No log errors found to report.// This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
[GitHub] [cloudstack-documentation] ACSGitBot commented on pull request #182: add nodejs as dependency for building from source
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[GitHub] [cloudstack-documentation] rhtyd commented on pull request #182: add nodejs as dependency for building from source
rhtyd commented on pull request #182: URL: https://github.com/apache/cloudstack-documentation/pull/182#issuecomment-764610300 requesting docbuild This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
[GitHub] [cloudstack-documentation] rhtyd opened a new pull request #182: add nodejs as dependency for building from source
rhtyd opened a new pull request #182: URL: https://github.com/apache/cloudstack-documentation/pull/182 This adds nodejs dependency for building for apt/yum This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
Re: Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint)
Hi, I used SharedMountPoint a very long time ago with GlusterFS before Cloudstack had native integration. Don't remember the details, but overall my impression was that it worked surprisingly well, of course back then there weren't as many feature, so less stuff to test. I would give it a go. As a side note, I did also use iSCSI with CLVM with success, it was quite fast. I ended up doing it because it was difficult to get OCFS running on EL6 and GFS2 had a reputation for being very slow. Marcus has a lot of experience with this, might want to get in touch with him: https://www.slideshare.net/MarcusLSorensen/cloud-stack-clvm HTH, Lucian On 2021-01-21 09:32, Wido den Hollander wrote: Hi, For a specific use-case I'm looking into the possibility to use iSCSI in combination with KVM. Use-case: Low-latenc I/O with 4k blocks and QD=1 KVM with CloudStack doesn't support iSCSI natively and the docs and other blogs refer to using 'SharedMountPoint' with OCFS2 or GFS2: - http://docs.cloudstack.apache.org/en/latest/adminguide/storage.html#hypervisor-support-for-primary-storage - https://www.shapeblue.com/installing-and-configuring-an-ocfs2-clustered-file-system/ It has been a really long time since I've used OCFS2 and I wanted to see what experiences from other people are. How is the stability and performance of OFCS2? It seems that performance should be rather good as lock/s is a problem with clustered filesystems, but since we only lock the QCOW2 file on boot of the VM that shouldn't be an issue. In addition to OCFS2, how mature is 'SharedMountPoint' as a storage pool with KVM. Does is support all the features NFS supports? Thanks, Wido
Experiences with KVM, iSCSI and OCFS2 (SharedMountPoint)
Hi, For a specific use-case I'm looking into the possibility to use iSCSI in combination with KVM. Use-case: Low-latenc I/O with 4k blocks and QD=1 KVM with CloudStack doesn't support iSCSI natively and the docs and other blogs refer to using 'SharedMountPoint' with OCFS2 or GFS2: - http://docs.cloudstack.apache.org/en/latest/adminguide/storage.html#hypervisor-support-for-primary-storage - https://www.shapeblue.com/installing-and-configuring-an-ocfs2-clustered-file-system/ It has been a really long time since I've used OCFS2 and I wanted to see what experiences from other people are. How is the stability and performance of OFCS2? It seems that performance should be rather good as lock/s is a problem with clustered filesystems, but since we only lock the QCOW2 file on boot of the VM that shouldn't be an issue. In addition to OCFS2, how mature is 'SharedMountPoint' as a storage pool with KVM. Does is support all the features NFS supports? Thanks, Wido
