Re: [Linux-HA] Support for DRDB
On 18 Jan 2015, at 3:45 am, Lars Marowsky-Bree l...@suse.com wrote: On 2015-01-16T16:25:15, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I am glad to hear that SLE HA has no plans to drop support for DRBD. Unfortunately I currently cannot disclose who is spreading this false information. Too bad. Do let them know they're quite wrong though ;-) And ask them to stop repeating it. ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 17 Jan 2015, at 4:19 am, Digimer li...@alteeve.ca wrote: On 16/01/15 10:43 AM, Dmitri Maziuk wrote: On 1/16/2015 8:39 AM, Lars Marowsky-Bree wrote: On 2015-01-16T11:56:04, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I have been told that support for DRBD is supposed to be phased out from both SLES and RHEL in the near future. This is massively incorrect for SLE HA. (drbd is part of the HA add-on, not SLES.) We have absolutely no such plans, and will continue to support drbd as part of our offerings. Where did you hear that? Don't know about RHEL but on Centos you get DRBD from ELRepo, not even EPEL, so I expect it has not been in the RHEL for quite some time. Unless RedHat's offering it as a separate add-on to their paying customers (but the last rumour I heard was they wouldn't do it 'cause they didn't want to share the loot with linbit). Dima When RHEL 6 was released, Red Hat wanted to reduce their support overhead a lot. So many things that used to be supported were dropped. To my knowledge, DRBD was never actually supported. Which would mean Red Hat's co-operation with Linbit has only ever increased over time - something I can't imagine changing. DRBD, unlike most other dropped programs, is still supported, just not by RH directly. They worked out an agreement with LINBIT to allow officially supported RHEL systems to be fully supported when they ran DRBD. The agreement was that RHEL users who needed DRBD support specifically would be routed to LINBIT for that support. So though it's changed, it is still supported. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 2015-01-16T16:25:15, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I am glad to hear that SLE HA has no plans to drop support for DRBD. Unfortunately I currently cannot disclose who is spreading this false information. Too bad. Do let them know they're quite wrong though ;-) Regards, Lars -- Architect Storage/HA SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg) Experience is the name everyone gives to their mistakes. -- Oscar Wilde ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 1/16/2015 8:26 PM, Digimer wrote: ... CentOS aims to repackage RHEL RPMs exactly, then changes only trademarks. Gluster is, as I understand it, fully open source so I can see no reason, from a general position, why gluster's RPMs on CentOS should be treated any differently. Because the straight open source RHEL gluster rpm does not include any daemons. Those are RHEL's own, they are called Red Hat Storage Server, they are a for-pay add-on and so they are not in centos. More or less. IRL they apparently shine on top of a 10Gb network. Or better, three 10Gb networks. DRBD works just fine over a crossover piece of cat-5e. I use it extensively on both 1 Gbps copper (always through a switch) and 10 Gbps SFP+ (again, always through a switch). In all cases, I use dual links in simple mode=1 (active/passive) bonding with each leg to a different switch in a stacked pair. In both cases, I can get replication speeds very very close to the maximum the underlying network is capable of. So in this light, I am not really sure what issues you might be referencing are. Can you expand on your comments? What do you mean by it? If it is DRBD, I've several active/passive pairs running it over cat5e crossover cable it shares with heartbeat. I've no complaints about replication speeds either. The 3x10Gbps was a reference to OpenStack, actually, now that I think about it. Ceph just says 10Gb is worth considering and gluster sez oh, we could list a few success stories... and then don't. Dima ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 2015-01-16T11:56:04, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I have been told that support for DRBD is supposed to be phased out from both SLES and RHEL in the near future. This is massively incorrect for SLE HA. (drbd is part of the HA add-on, not SLES.) We have absolutely no such plans, and will continue to support drbd as part of our offerings. Where did you hear that? Regards, Lars -- Architect Storage/HA SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg) Experience is the name everyone gives to their mistakes. -- Oscar Wilde ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 1/16/2015 8:39 AM, Lars Marowsky-Bree wrote: On 2015-01-16T11:56:04, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I have been told that support for DRBD is supposed to be phased out from both SLES and RHEL in the near future. This is massively incorrect for SLE HA. (drbd is part of the HA add-on, not SLES.) We have absolutely no such plans, and will continue to support drbd as part of our offerings. Where did you hear that? Don't know about RHEL but on Centos you get DRBD from ELRepo, not even EPEL, so I expect it has not been in the RHEL for quite some time. Unless RedHat's offering it as a separate add-on to their paying customers (but the last rumour I heard was they wouldn't do it 'cause they didn't want to share the loot with linbit). Dima ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
Hi Lars, thanks for the update. I am glad to hear that SLE HA has no plans to drop support for DRBD. Unfortunately I currently cannot disclose who is spreading this false information. Regards, --martin konold Von: linux-ha-boun...@lists.linux-ha.org linux-ha-boun...@lists.linux-ha.org im Auftrag von Lars Marowsky-Bree l...@suse.com Gesendet: Freitag, 16. Januar 2015 15:39 An: linux-ha@lists.linux-ha.org Betreff: Re: [Linux-HA] Support for DRDB On 2015-01-16T11:56:04, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I have been told that support for DRBD is supposed to be phased out from both SLES and RHEL in the near future. This is massively incorrect for SLE HA. (drbd is part of the HA add-on, not SLES.) We have absolutely no such plans, and will continue to support drbd as part of our offerings. Where did you hear that? Regards, Lars -- Architect Storage/HA SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton, HRB 21284 (AG Nürnberg) Experience is the name everyone gives to their mistakes. -- Oscar Wilde ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 16/01/15 10:43 AM, Dmitri Maziuk wrote: On 1/16/2015 8:39 AM, Lars Marowsky-Bree wrote: On 2015-01-16T11:56:04, EXTERNAL Konold Martin (erfrakon, RtP2/TEF72) external.martin.kon...@de.bosch.com wrote: I have been told that support for DRBD is supposed to be phased out from both SLES and RHEL in the near future. This is massively incorrect for SLE HA. (drbd is part of the HA add-on, not SLES.) We have absolutely no such plans, and will continue to support drbd as part of our offerings. Where did you hear that? Don't know about RHEL but on Centos you get DRBD from ELRepo, not even EPEL, so I expect it has not been in the RHEL for quite some time. Unless RedHat's offering it as a separate add-on to their paying customers (but the last rumour I heard was they wouldn't do it 'cause they didn't want to share the loot with linbit). Dima When RHEL 6 was released, Red Hat wanted to reduce their support overhead a lot. So many things that used to be supported were dropped. DRBD, unlike most other dropped programs, is still supported, just not by RH directly. They worked out an agreement with LINBIT to allow officially supported RHEL systems to be fully supported when they ran DRBD. The agreement was that RHEL users who needed DRBD support specifically would be routed to LINBIT for that support. So though it's changed, it is still supported. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 01/16/2015 11:19 AM, Digimer wrote: When RHEL 6 was released, Red Hat wanted to reduce their support overhead a lot. So many things that used to be supported were dropped. DRBD, unlike most other dropped programs, is still supported, just not by RH directly. They worked out an agreement with LINBIT to allow officially supported RHEL systems to be fully supported when they ran DRBD. Ah, OK. We moved from RHEL to Centos a few years back so I'm not quite up to date on official RedHat's offerings anymore. I do know they bought ceph recently and now have their own shiny! cloudy! replicated iscsi block device, so ... -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu signature.asc Description: OpenPGP digital signature ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 16/01/15 01:50 PM, Dimitri Maziuk wrote: On 01/16/2015 11:19 AM, Digimer wrote: When RHEL 6 was released, Red Hat wanted to reduce their support overhead a lot. So many things that used to be supported were dropped. DRBD, unlike most other dropped programs, is still supported, just not by RH directly. They worked out an agreement with LINBIT to allow officially supported RHEL systems to be fully supported when they ran DRBD. Ah, OK. We moved from RHEL to Centos a few years back so I'm not quite up to date on official RedHat's offerings anymore. I do know they bought ceph recently and now have their own shiny! cloudy! replicated iscsi block device, so ... Two comments; 1. CentOS replicates RHEL, warts and all. RHEL doesn't ship the DRBD RPMs anymore (that comes from the support via LINBIT), so thus, the RPMs aren't in CentOS, either. 2. DRBD is an HA technology, ceph/gluster are cloud technologies. Of course there is overlap (specially when someone tries to hammer solutions into place), but there really serve different use-cases. DRBD excels (and I would argue is untouched) in it's ability to replicate storage across two nodes, perfect for 90% of HA clusters. On the other hand, from what I've gathered, ceph/gluster shine brightest when they're on top of many nodes. Their goal is, first, scalability and resource utilization. DRBD's is, first, data protection. So I don't think (but I don't know) that Red Hat's decision was based on an we have our own shiny!) argument. I think that it was a case of looking at the back-porting effort of supporting DRBD on the 2.6.32 kernel (drbd didn't go mainline until .33), looked at the potential revenue vs cost, came up with a viable alternative for customers who needed it and settled on that. Again, my understanding only, I could be wrong. -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 01/16/2015 05:33 PM, Digimer wrote: 1. CentOS replicates RHEL, warts and all. Not exactly. E.g. gluster is a for-pay RHEL add-on. There's some kind of gluster rpm in Centos but it's pretty much disfunctional: you have to remove that, add the upstream gluster repo and get your gluster from there. 2. DRBD is an HA technology, ceph/gluster are cloud technologies. ... from what I've gathered, ceph/gluster shine brightest when they're on top of many nodes. Their goal is, first, scalability and resource utilization. DRBD's is, first, data protection. More or less. IRL they apparently shine on top of a 10Gb network. Or better, three 10Gb networks. DRBD works just fine over a crossover piece of cat-5e. Again, my understanding only, I could be wrong. Oh, it's a pure speculation on my part. Any resemblance to the actual RedHat is purely coincidental and all that. ;) -- Dimitri Maziuk Programmer/sysadmin BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu signature.asc Description: OpenPGP digital signature ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
Re: [Linux-HA] Support for DRDB
On 16/01/15 07:29 PM, Dimitri Maziuk wrote: On 01/16/2015 05:33 PM, Digimer wrote: 1. CentOS replicates RHEL, warts and all. Not exactly. E.g. gluster is a for-pay RHEL add-on. There's some kind of gluster rpm in Centos but it's pretty much disfunctional: you have to remove that, add the upstream gluster repo and get your gluster from there. I don't use gluster myself, so I can make no intelligent comment on this. All I can say is that, in general, CentOS aims to repackage RHEL RPMs exactly, then changes only trademarks. Gluster is, as I understand it, fully open source so I can see no reason, from a general position, why gluster's RPMs on CentOS should be treated any differently. 2. DRBD is an HA technology, ceph/gluster are cloud technologies. ... from what I've gathered, ceph/gluster shine brightest when they're on top of many nodes. Their goal is, first, scalability and resource utilization. DRBD's is, first, data protection. More or less. IRL they apparently shine on top of a 10Gb network. Or better, three 10Gb networks. DRBD works just fine over a crossover piece of cat-5e. I use it extensively on both 1 Gbps copper (always through a switch) and 10 Gbps SFP+ (again, always through a switch). In all cases, I use dual links in simple mode=1 (active/passive) bonding with each leg to a different switch in a stacked pair. In both cases, I can get replication speeds very very close to the maximum the underlying network is capable of. So in this light, I am not really sure what issues you might be referencing are. Can you expand on your comments? Again, my understanding only, I could be wrong. Oh, it's a pure speculation on my part. Any resemblance to the actual RedHat is purely coincidental and all that. ;) :p -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? ___ Linux-HA mailing list Linux-HA@lists.linux-ha.org http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
