Re: [DRBD-user] DRBD - Slow Performance

2010-02-15 Thread Digimer
Dan Lavu wrote: ### version: 8.3.2 (api:88/proto:86-90) GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by mockbu...@v20z-x86-64.home.local, 2009-08-29 14:07:55 0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r

Re: [DRBD-user] Guarantee write to both nodes

2010-03-19 Thread Digimer
. This sync operation brings the other node back to being identical to the good node. What, exactly, are you trying to accomplish? -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd

Re: [DRBD-user] Guarantee write to both nodes

2010-03-19 Thread Digimer
like it's a bit outside of the original goal of DRBD, but it might be doable via the 'on-io-error' or 'fencing' options. Take a look at this: http://www.drbd.org/users-guide/re-drbdconf.html -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http

Re: [DRBD-user] dual primary mode with which FS

2010-03-23 Thread Digimer
On 10-03-23 02:50 PM, Florian Haas wrote: On 03/23/2010 07:35 PM, Michael Schwartzkopff wrote: Am Dienstag, 23. März 2010 17:08:56 schrieb Digimer: On 10-03-23 10:02 AM, Florian Haas wrote: On 2010-03-23 14:52, Michael Schwartzkopff wrote: Am Freitag, 19. März 2010 14:12:30 schrieb

[DRBD-user] Rescanning LVM after DRBD starts on CentOS 5

2010-05-19 Thread Digimer
). Should I be asking this on the LVM mailing list? I figured it's more appropriate here as not so many LVM users use DRBD as the other way around. :) -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org

Re: [DRBD-user] drbd-8.3.8rc1.tar.gz

2010-05-21 Thread Digimer
an idea of what tests I could run to best test this, I'll be happy to load it up on my test cluster this weekend. -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing

[DRBD-user] Documentation for the new config file format

2010-08-30 Thread Digimer
). Is there an updated guide I could review? Thanks! -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo

[DRBD-user] Problem with DRBD and CLVM

2010-09-09 Thread Digimer
stable (I'm not getting random fencing as I'd expect with network issues). Any idea what might be going on? Thanks! -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user

Re: [DRBD-user] Problem with DRBD and CLVM

2010-09-09 Thread Digimer
On 10-09-09 01:06 PM, Adam Gandelman wrote: On 09/09/2010 07:18 AM, Digimer wrote: vgcreate -c y drbd_vg0 /dev/drbd0 Found duplicate PV 4BbAHN2mFIP5pJsUE1ktdjSBwgFegmaG: using /dev/md3 not /dev/drbd0 Error locking on node node name: Command timed out Can't get lock for orphan PVs

Re: [DRBD-user] DRBD on top of LVM - 50% performace drop

2010-09-10 Thread Digimer
connected... As an aside, have you considered simply freezing and dd'ing your VM when you want to migrate it? It doesn't seem like you really need DRBD if you're not concerned about keeping the data sync'ed across two nodes. -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http

Re: [DRBD-user] ds:Inconsistent/Diskless

2010-09-12 Thread Digimer
On 10-09-12 07:35 PM, Sam Przyswa wrote: Le 12/09/2010 19:36, Digimer a écrit : On 10-09-12 09:31 AM, Sam Przyswa wrote: Hi, I use DRBD 8.3.7 on Debian 5.0.6 on Vserver in both side, 2nd machine is a 1st clone. There is may drbd.conf

Re: [DRBD-user] ds:Inconsistent/Diskless

2010-09-12 Thread Digimer
Diskless, it won't work. -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] ds:Inconsistent/Diskless

2010-09-13 Thread Digimer
On 10-09-13 03:31 PM, David Coulson wrote: Don't you really need cluster aware LVM for that? In Primary/Primary mode, yes you do. You also need a working cluster that's providing DLM. -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http

Re: [DRBD-user] Dual-Primary Split Brain

2010-09-30 Thread Digimer
drbdadm invalidate r0 drbdadm connect r0 drbdadm connect r0 drbdadm primary r0 drbdadm primary r0 -- Digimer E-Mail: li...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd

[DRBD-user] Adapting a new fence device for DRBD

2010-11-05 Thread Digimer
, mark itself as more UpTpDate and then invalidate the peer if and when it recovers from the fence action. Is this a correct understanding? Any further information would be much appreciated. :) -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http

Re: [DRBD-user] System lockup with DRBD

2010-11-06 Thread Digimer
at what step it failed and what, if anything, was shown in either /proc/drbd or /var/log/messages. HTH -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user

Re: [DRBD-user] System lockup with DRBD

2010-11-06 Thread Digimer
. Can you copy your setup to a different set of hardware, again to test? I'm throwing mud at a wall to see what sticks... -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-05 Thread Digimer
. HTH -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] configuring 2 services on 2 hosts

2011-01-05 Thread Digimer
is an inexpensive route to much better uptime. :) -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo

Re: [DRBD-user] configuring 2 services on 2 hosts

2011-01-05 Thread Digimer
On 01/05/2011 03:26 PM, J wrote: On 1/5/2011 12:49 PM, Digimer wrote: On 01/05/2011 11:48 AM, J wrote: Hello, This is my first go at setting up any HA services, so I wanted to see if anyone on the list had a similar setup or any recommendations on doing this better using drbd. I'm setting

Re: [DRBD-user] configuring 2 services on 2 hosts

2011-01-06 Thread Digimer
On 01/06/2011 01:13 PM, J. Ryan Earl wrote: Reply inline: On Thu, Jan 6, 2011 at 7:46 AM, Digimer li...@alteeve.com mailto:li...@alteeve.com wrote: On 01/06/2011 03:27 AM, Felix Frank wrote: In any case, be sure to have (at least) RAID 1 on each node backing the DRBD

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-06 Thread Digimer
would fail for many other reasons, too). -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-06 Thread Digimer
On 01/06/2011 06:25 PM, Lentes, Bernd wrote: Digimer wrote: On 01/06/2011 03:14 PM, Lentes, Bernd wrote: How can a dual primary solution works, when i install the VM's in a plain lv ? Don't i need a cluster aware filesystem (like OCFS2) for a dual primary solution ? Bernd Dual

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-07 Thread Digimer
when using one LV per VM though, so that live-migration is available, afaik. Regards, Felix You are right. If you have one DRBD resource per LV/VM, then you will avoid the scenario I described. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-07 Thread Digimer
On 01/07/2011 11:25 AM, Lentes, Bernd wrote: Digimer wrote: i thought dual primary means, that i have services (like a VM) running on both nodes. Am i wrong ? Bernd That is a use for dual-primary, but not technically the same thing. All that dual-primary gives you is block-level

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-08 Thread Digimer
On 01/08/2011 11:32 AM, Lentes, Bernd wrote: Digimer wrote: On 01/07/2011 04:00 PM, Lentes, Bernd wrote: VM1A and VM1B are identical VM's, offering the same service ! Here is the confusion. When you say identical, you are referring to the underlying data being mirrored on both nodes

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-09 Thread Digimer
On 01/09/2011 12:00 PM, Lentes, Bernd wrote: Hi, Currently everything is clear. Thanks for your help Bernd Glad to hear it. Have fun! :) -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-13 Thread Digimer
hard drive from the point of view of the VM. To back it up, in a non-clustered environment, you can use tradition LVM snapshoting. This occurs below the VM, so it needs not know anything about it. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-14 Thread Digimer
On 01/14/2011 07:11 AM, Lentes, Bernd wrote: Digimer wrote: Hi, how can i backup a VM which is installed in a plain LV without no fs ? No fs - no mount - no backup, right ? I'd like to backup the vm's in the host. Could a lv snapshot be helpful ? Bernd The LV is, essentially

Re: [DRBD-user] DRBD and KVM for a HA-Cluster ?

2011-01-14 Thread Digimer
On 01/14/2011 10:01 AM, Lentes, Bernd wrote: Digimer wrote: I suppose you could create the snapshot and then use 'dd' to create a bit-level image of the LV. If i have a lv of 50 GB for example, i think dd will need a long time, right ? Bernd Yup, won't be the fastest in the world

Re: [DRBD-user] DRBD + LVM backup

2011-02-03 Thread Digimer
). -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] How Long Can a Primary Stay Disconnected from a Secondary?

2011-03-03 Thread Digimer
On 03/03/2011 12:09 PM, Florian Haas wrote: On 2011-03-03 16:13, Digimer wrote: On 03/03/2011 10:05 AM, Robinson, Eric wrote: I am thinking about taking a secondary node offline for maintenance during production hours. I assume it cannot stay offline forever because eventually the primary

Re: [DRBD-user] How Long Can a Primary Stay Disconnected from a Secondary?

2011-03-03 Thread Digimer
On 03/03/2011 01:37 PM, Florian Haas wrote: On 03/03/2011 06:20 PM, Digimer wrote: On 03/03/2011 12:09 PM, Florian Haas wrote: On 2011-03-03 16:13, Digimer wrote: On 03/03/2011 10:05 AM, Robinson, Eric wrote: I am thinking about taking a secondary node offline for maintenance during

Re: [DRBD-user] RHCS and dual primary

2011-04-08 Thread Digimer
that starts, in order, drbd - clvmd - gfs2. Then you can create normal services, failover groups and whatnot. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd

Re: [DRBD-user] dealing with permanent node failure in primary/primary

2011-04-18 Thread Digimer
for the first time. Once it connects, it should begin a full sync. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http

Re: [DRBD-user] DRBD or not DRBD ?

2011-04-22 Thread Digimer
; disk/dev/sda6; } } -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com

Re: [DRBD-user] DRBD or not DRBD ?

2011-04-24 Thread Digimer
of the file system. Non-clustered file systems expect that they are the only one with access to the storage, and will quickly corrupt is anything else changes the data. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org

Re: [DRBD-user] DRBD or not DRBD ?

2011-04-24 Thread Digimer
On 04/24/2011 09:57 PM, Whit Blauvelt wrote: Digimer, I really thank you for your long-form discussion. So much of the writing on this stuff is terse, making for a steep learning curve. You should be using Clustered LVM (clvmd). This way the LVM PV/VG/LVs are in sync across both nodes

Re: [DRBD-user] DRBD or not DRBD ?

2011-04-26 Thread Digimer
admit, you lost me somewhat in your reference to emailing people. :) Any notable systems events around here result in notices, whether through Nagios or independently. Ah Best, and thanks again, Whit Best of luck. :) -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com

Re: [DRBD-user] ds:Inconsistent/Diskless

2011-04-28 Thread Digimer
The 'on data {}' device values are supposed to point to the actual backing devices for the resources (ie: device /dev/sda3, device /dev/md1). -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org

Re: [DRBD-user] ds:Inconsistent/Diskless

2011-04-28 Thread Digimer
our ecrit. :) -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] ds:Inconsistent/Diskless

2011-04-28 Thread Digimer
On 04/28/2011 09:17 AM, Digimer wrote: The 'on data {}' device values are supposed to point to the actual backing devices for the resources (ie: device /dev/sda3, device /dev/md1). In English - This is totally wrong of me. I shall be more careful posting on the morning train lacking coffee

Re: [DRBD-user] dd backup of Xen DomU on a DRBD device

2011-05-10 Thread Digimer
server. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org I feel confined, only free to expand myself within boundaries. ___ drbd-user mailing list drbd-user@lists.linbit.com http

[DRBD-user] Announce - Tutorial using DRBD to host high-availability Xen VMs on Red Hat cluster suite

2011-05-16 Thread Digimer
about a cluster. Any feedback is appreciated! -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org I feel confined, only free to expand myself within boundaries. ___ drbd-user mailing list

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-19 Thread Digimer
the actual possible speed can hurt performance. You said that you sustained ~200M before, right? Try setting the sync rate to 180M and see if that works any better. -- Digimer E-Mail: digi...@alteeve.com AN!Whitepapers: http://alteeve.com Node Assassin: http://nodeassassin.org I feel confined

Re: [DRBD-user] Dual-primary/ Very slow synchronization

2011-05-19 Thread Digimer
On 05/19/2011 02:16 PM, Daniel Meszaros wrote: Hi! Am 05/19/2011 03:48 PM, schrieb Digimer: Setting a sync speed greater than the actual possible speed can hurt performance. You said that you sustained ~200M before, right? Try setting the sync rate to 180M and see if that works any better

Re: [DRBD-user] VERY easy to use script for kvm/drbd/ha

2011-06-02 Thread Digimer
try and improve this ( a lot :-) ) Standard disclaimer: I am not responsible if this script destroys your data and/or server. Use at your own risk Asking people on a mailing list to open a zip file attachment is not going to get very far. Can you set this up on github or the like? -- Digimer E

Re: [DRBD-user] Simple LVM without clvmd?

2011-06-03 Thread Digimer
is not that difficult, but it does require understanding the fundamentals. Once you have the cluster formed, you will find that CLVM works just fine. It certainly doesn't lock LVs for not reason. :) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects

Re: [DRBD-user] Poor DRBD performance, HELP!

2011-06-18 Thread Digimer
what speed you get (both alone and using ramdisk to back a DRBD resource). -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org I feel confined, only free to expand myself within

Re: [DRBD-user] DRBD resync QoS

2011-06-21 Thread Digimer
. :) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org I feel confined, only free to expand myself within boundaries. ___ drbd-user mailing list drbd

Re: [DRBD-user] DRBD resync QoS

2011-06-21 Thread Digimer
On 06/21/2011 09:51 PM, wang xuchen wrote: Digimer, Thanks for your reply. I come up with the number 300M from DRBD official website A good rule of thumb for this value(rate parameter) is to use about 30% of the available replication bandwidth. . I use 10G Ethernet card for replication traffic

Re: [DRBD-user] problem setting up a logical volume with drbd

2011-07-19 Thread Digimer
if this is a drbd issue or an lvm. I can't seem to find anything on it. Thanks Ken Lowther Obvius question first; Is the DRBD in Primary? Please share more details about your config so that folks can better help you, rather than making wild stabs in the dark. :) -- Digimer E-Mail

Re: [DRBD-user] problem setting up a logical volume with drbd

2011-07-19 Thread Digimer
LVM will not touch clustered LVs. As an aside, be sure to set 'fallback_to_local_locking' to 0. You never want a clustered LV to ever use local locking. Though it seems you may already have done this. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers

Re: [DRBD-user] problem setting up a logical volume with drbd

2011-07-19 Thread Digimer
On 07/19/2011 12:47 PM, lists...@outofoptions.net wrote: Digimer. Thanks for the help. I went back and partitioned the drive for lvm and then it didn't show up at all. I removed the partitions and suddenly everything went according to plan. I'm guessing this just got everything back

[DRBD-user] 8.3.11 on RHEL 5.7 w/ MTU of 9000 fails

2011-07-22 Thread Digimer
, I just need to know where. :) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org At what point did we forget that the Space Shuttle was, essentially, a program that strapped human

Re: [DRBD-user] 8.3.11 on RHEL 5.7 w/ MTU of 9000 fails

2011-07-23 Thread Digimer
On 07/23/2011 03:30 PM, Andreas Hofmeister wrote: On 23.07.2011 06:30, Digimer wrote: Any way to debug this? If it looks like a DRBD bug, I don't think so. I have DRBD running with jumbo frames on several machines and it just work (albeit with 0.8.10). Check you networking. Try ping -c1

Re: [DRBD-user] Redundant network connection

2011-07-24 Thread Digimer
On 07/24/2011 03:48 PM, Lucian Torje wrote: Hi, Is it possible to use multiple network connections for the same node - redundant network, in case one fails the other one should be used. Using DRBD over a standard bonded connection works fine. -- Digimer E-Mail: digi

Re: [DRBD-user] Unterschiedliche Versionen kombinieren?

2011-07-28 Thread Digimer
fehlt das Backup. Ohne Backup will ich aber nicht updaten. :-/ CU, Mészi. ごめんなさい、でも、このリストで英語を話すをください。ここの人はドイブツ 語と日本語も話せません。 ;) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org

Re: [DRBD-user] Recover primary node from disk failure.

2011-07-29 Thread Digimer
can do so without downtime (ie: live-migrate a VM, is that is what is using the DRBD storage). The reason being that if anything happens to the communication with the secondary, the primary will drop to Secondary until it's local storage is UpToDate. -- Digimer E-Mail: digi

Re: [DRBD-user] Remove network cable causing system reboot

2011-08-16 Thread Digimer
-and-stonith; } handlers { outdate-peer/sbin/obliterate-peer.sh; } = Replace that script if you're not using red hat cluster service with a script that will call the fence device of your choice. -- Digimer E-Mail: digi...@alteeve.com Freenode

Re: [DRBD-user] correction: DRBD does not do encryption -- was: Remove network cable causing system reboot

2011-08-16 Thread Digimer
On 08/16/2011 04:22 PM, Lars Ellenberg wrote: On Tue, Aug 16, 2011 at 12:55:28PM -0400, Digimer wrote: A couple of comments: net { allow-two-primaries; cram-hmac-alg sha1; shared-secret 123456; You're on a dedicated

Re: [DRBD-user] Incorrect syncer rate

2011-08-22 Thread Digimer
'syncer' to no more than 30% of that speed. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org At what point did we forget that the Space Shuttle was, essentially, a program

Re: [DRBD-user] Corosync and DRBD fencing: one or both?

2011-08-29 Thread Digimer
and fence). -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org At what point did we forget that the Space Shuttle was, essentially, a program that strapped human beings to an explosion

Re: [DRBD-user] Corosync and DRBD fencing: one or both?

2011-08-30 Thread Digimer
On 08/30/2011 11:25 AM, William Seligman wrote: On 8/29/11 4:42 PM, Digimer wrote: On 08/29/2011 03:36 PM, William Seligman wrote: A general question: I have a Corosync+Pacemaker with DRBD setup on Linux; I'll give the details if it's relevant. Corosync+Pacemaker controls DRBD start, stop

[DRBD-user] Using names instead of IPs in resource 'address' entries

2011-09-06 Thread Digimer
I missing something obvious? If it is possible, please let me know. If it's not possible, may I ask why not? Would it be possible to request this ability as a feature request for a future release? -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers

Re: [DRBD-user] A few configuration questions specific to RHEL 5 primary/primary GFS2 setup

2011-10-12 Thread Digimer
relative to the bare drives underneath? How does that change when you add simple GFS2? How about if you used CLVMd as a (test) alternative? If the latency is fairly close between GFS2 and clvmd, it's possibly DLM overhead. -- Digimer E-Mail: digi...@alteeve.com Freenode handle

Re: [DRBD-user] A few configuration questions specific to RHEL 5 primary/primary GFS2 setup

2011-10-12 Thread Digimer
problem you are trying to solve with your cluster. At this point, it's a lot of conjecture and guessing. With details of what you need, we might be able to offer more specific advice and ask more intelligent questions. Cheers, -- Digimer E-Mail: digi...@alteeve.com Freenode handle

Re: [DRBD-user] A few configuration questions specific to RHEL 5 primary/primary GFS2 setup

2011-10-12 Thread Digimer
On 10/12/2011 02:34 PM, Kushnir, Michael (NIH/NLM/LHC) [C] wrote: Digimer, Thanks again for holding my hand on this. I've already started reading your wiki posts. I wish Google gave your site a better ranking. I've been doing research for months, and your articles (especially comments

Re: [DRBD-user] DRBD Split-Brain auto recover

2011-11-27 Thread Digimer
ISO, ~3.5GB written. Node B saved a hours worth of credit card transactions, ~1MB written. Which node has the more valuable data? The best you can do is configure and test fencing so that you can avoid split brain conditions in the first place. -- Digimer E-Mail: digi

Re: [DRBD-user] Cluster filesystem question

2011-12-01 Thread Digimer
. Caveat - I did not read the thread before now. If this is totally out to left field, my apologies. :) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead

Re: [DRBD-user] Split brain problem.

2011-12-04 Thread Digimer
though. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

Re: [DRBD-user] Split brain problem.

2011-12-04 Thread Digimer
On 12/04/2011 09:25 PM, Ivan Pavlenko wrote: Hi ALL, Digimer, thank you again for your answer I'm really appreciate it! Unfortunately, I've tried to fixes split brain manually several times. It doesn't work. # drbdadm disconnect r0 [root@infplsm017 ~]# drbdadm secondary r0 1: State

Re: [DRBD-user] DRBD for CentOS 6?

2011-12-12 Thread Digimer
.elrepo.noarch.rpm yum install drbd83-utils kmod-drbd83 - -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

Re: [DRBD-user] Could you please recommend hardware?

2011-12-28 Thread Digimer
. Regardless, I've found it a worthy investment to have dedicated, bonded (mode=1 Active/Passive) interfaces dedicated to DRBD and a separate network connection for other traffic. hth -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com

[DRBD-user] New Tutorial - RHCS + DRBD + KVM; 2-Node HA on EL6

2012-01-03 Thread Digimer
components explained. * Includes all testing steps covered. * Configuration is used in production environments! This tutorial is totally free (no ads, no registration) and released under the Creative Common 3.0 Share-Alike Non-Commercial license. Feedback is always appreciated! -- Digimer E-Mail

Re: [DRBD-user] Best Distribuition for DRBD Deployment

2012-01-07 Thread Digimer
to match yours. Cheers -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

Re: [DRBD-user] Best Distribuition for DRBD Deployment

2012-01-08 Thread Digimer
. None of the RHEL 6 Add-ons get you DRBD. HA just gives you cman/rgmanager/etc. I think even pacemaker is still tech preview as of 6.2. David Ya, you get a linbit repository so installing and updating DRBD is the same as updating the system itself. -- Digimer E-Mail: digi

Re: [DRBD-user] Tales of woe - possible Debian Squeeze kernel bugs, possible DRBD bugs, possible Xen bugs...

2012-01-11 Thread Digimer
node lives, you found the issue. You *are* using fencing, right? ;) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation

[DRBD-user] fence-peer guidelines

2012-01-12 Thread Digimer
handlers? Thanks! -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

[DRBD-user] New fence handler for RHCS; rhcs_fence

2012-01-14 Thread Digimer
: https://github.com/digimer/rhcs_fence The main differences are: - No longer restricted to 2-node clusters. So long as DRBD_PEERS is set to a name found in 'cman_tool', the proper node will be fenced. - More sanity checks are made to help minimize the risk of dual-fencing. First, dynamic

Re: [DRBD-user] Master - master and split brain if network is saturated

2012-01-15 Thread Digimer
link or a saturated link, it appears the same to DRBD and will trigger the fence handler. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again

Re: [DRBD-user] Master - master and split brain if network is saturated

2012-01-15 Thread Digimer
in production then, I guess it is the only way. thanks for the info nevertheless, Generally a good idea. Test to see what your underlying storage is capable of and then ensure your network bandwidth is higher, if you can. Cheers -- Digimer E-Mail: digi...@alteeve.com Freenode handle

Re: [DRBD-user] New fence handler for RHCS; rhcs_fence

2012-01-15 Thread Digimer
, but 06a126f315b2f1cbcf2bc7485507815266d34 (https://github.com/digimer/rhcs_fence/commit/06a126f315b2f1cbcf2bc7485507815266d34926) reflects your feedback. Cheers! -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
to a normal operating state. -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
://alteeve.com/w/2-Node_Red_Hat_KVM_Cluster_Tutorial#Configuring_DRBD -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
when they are in the archives. :) -- Digimer E-Mail: digi...@alteeve.com Freenode handle: digimer Papers and Projects: http://alteeve.com Node Assassin: http://nodeassassin.org omg my singularity battery is dead again. stupid hawking radiation. - epitron

Re: [DRBD-user] Dual-primary to single node

2012-01-17 Thread Digimer
On 01/17/2012 01:09 PM, Luis M. Carril wrote: El 17/01/2012 18:56, Digimer escribió: On 01/17/2012 12:32 PM, Luis M. Carril wrote: Hello, Ok, the fencing and splitbrain mechanisms only enter to play when both nodes meet again after some failure. So... meanwhile the nodes doesn

Re: [DRBD-user] drbd and 10Gb/s network how to increase syncer rate beyond 100MB/s?

2012-01-27 Thread Digimer
that this value is ignored and 102MB/s is used. How can I increase the syncer rate in drbd84? I have not played with 8.4 yet, but if it is the same as 8.3, you should be able to push up the sync rate to 300MB/sec using; drbdsetup /dev/drbdX syncer -r 300M -- Digimer E-Mail: digi

Re: [DRBD-user] question about start drbd on single node after a power outage

2012-01-31 Thread Digimer
the issue though, you can use 'wfc-timeout 300' which will tell DRBD to wait up to 5 minutes for it's peer. After that time, consider itself primary. Please don't use this though until you've exhausted all other ways of starting safely. -- Digimer E-Mail: digi...@alteeve.com Papers

Re: [DRBD-user] Changes from lower level block device

2012-02-07 Thread Digimer
and configuring external metadata. -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] replication link stability

2012-02-16 Thread Digimer
? If not, I would suggest looking at DRBD Proxy instead, as it is designed to run over slow/unstable links, but it is asynchronous, so be advised that consistency is not always guaranteed. -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com

Re: [DRBD-user] replication link stability

2012-02-16 Thread Digimer
On 02/16/2012 11:02 AM, Piotr Kandziora wrote: Digimer, Thanks for your answer. DRBD Proxy could be a solution, but it is not possible for today. I am thinking of trying DRBD with protocol A, but currently I am not able to test on my environment as it is in production. I will have

Re: [DRBD-user] Documentation download another DRBD question

2012-02-17 Thread Digimer
cp instead of rsync? -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] Documentation download another DRBD question

2012-02-17 Thread Digimer
On 02/17/2012 11:42 AM, Brian O Mahony wrote: (Apologies for top posting - working off a different laptop as I broke mine this morning, and outlook is a pain) Jake/Maurits/Digimer, Thanks for the replies. Jake/Digimer: What it sounds like you need is LVM's snapshotting capability. DRBD

Re: [DRBD-user] Off-site Quorum Provider?

2012-03-02 Thread Digimer
in the main ring. Quorum over a stretch cluster is always tricky. With sufficient speed, you could look at qdisk, but that would likely induce as many problems as it solved. -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com

Re: [DRBD-user] Off-site Quorum Provider?

2012-03-02 Thread Digimer
On 03/02/2012 05:24 PM, Florian Haas wrote: On Fri, Mar 2, 2012 at 11:21 PM, Digimer li...@alteeve.com wrote: On 03/02/2012 04:41 PM, Robinson, Eric wrote: We have two geographically separate data centers connected by 4 x Gigabit links (in 2 trunks). Our HA clusters are distributed between

Re: [DRBD-user] DRBD uses a wrong interface.

2012-03-06 Thread Digimer
are confusing totem (corosync)'s communication (the log file entries and DRBD. Can you paste your cluster config to confirm? Digimer PS - I am tired and may be missing something obvious. :P -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com

Re: [DRBD-user] Rebooting the servers

2012-03-06 Thread Digimer
you restart. -- Digimer E-Mail: digi...@alteeve.com Papers and Projects: https://alteeve.com ___ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user

Re: [DRBD-user] Compilation problem

2012-03-14 Thread Digimer
On 03/14/2012 11:10 AM, Marcelo Pereira wrote: If you're installing it, why don't you install the latest version (8.4)? --Marcelo For production systems, I'd recommend staying with 8.3.12, as it is much better tested. 8.4 series is very promising, but it's still young. I'd recommend using it

Re: [DRBD-user] missing scripts or do I have to make them by myself?

2012-03-19 Thread Digimer
On 03/19/2012 12:33 PM, Carlos Xavier wrote: Hi. We have an old cluster made of OCFS2 running over DRBD using the heartbeat protocol. Now we are moving to DRBD + OCFS2 + Pacemaker. Following the steps from the user's manual I tried to make this configuration: disk { fencing

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