a
to drbd disk and then hangup. Then how can B know that the data will
be corrupt and do not start as primary DRBD.
Best Regards
Mia Lueng
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HI All:
In our case, we use drbd to sync oracle db data in two node across the
wan. Since the net bandwidth is slow(<2M), the i/o performance is
pretty poor in primary node because i/o operation will be pending to
wait the data transmission.
So we have considered the following solution: On secon
aster don't block while the data is shipped to the secondary?
> There's obviously a trade-off with coherency on the secondary but you
> don't have the latency.
>
> Sent from my iPhone
>
> On 20 Sep 2011, at 18:18, "Mia Lueng" wrote:
>
>> HI Al
in rhel6,(we uset sles11
sp1). Is there another way to merge the snapshot?
2011/9/21 Lionel Sausin :
> [Sorry, seems like my first post didn't make it to the list: resending]
>
> Dear Mia Lueng,
>
> We've been in this very situation for 6 month so I think I can anwser
I should give some additional information.
We build a two-node cluster with drbd. The following is the configuration.
resource drbd1 {
protocol A;
on host41 {
device /dev/drbd0 minor 0;
disk /dev/vgdrbd/oracle;
address
I built a two node cluster using drbd. After several drbdadm
primary/secondary operations, the drbd status turn to Unconnected
and drbdadm disconnect operation hangup and the following message
occurs in dmesg.
Oct 20 11:32:26 cgsl42 kernel: INFO: task cqueue:3267 blocked for more
than 120 seco
Hi All:
I have a two storage with 10T capacibility. When I doing initial
full sync ,it will take a whole night. How can I reduce the time doing
initial full sync.
Thanks
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Hi All:
I setup a drbd device on a storage . Its write performance can reach
to 300MB/s tested by dd. But when I setup a drbd device on it , use dd
to test its write performance (peer node does not connect). The test
result is only 40MB/s. drbd version is 8.3.13. And the read
performance is also
Hi All:
I set a clsuter based on drbd and do the following test:
On Node A, I set drbd as Primary, and run a mysql database on it
and some load. and run the following script
while [ 0 ] ; do
drbdadm connect drbd0 >/dev/null 2>&1
sleep 10;
done
On node B, I do the follwing test to simulate
Hi All:
I built a cluster to protect oracle database. The oracle db file
stored on the drbd(8.3.13) device using protocol A. But sometime
oracle can not be failover when the primary node is down. Here is the
testing step
1. node A, B, A is primary node, B is secondary node. oracle run on
node
???
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ocol A. Oracle
> expects that data is commited to the disk, which is in the RAM of your
> node A. I really have no idea in which situation protocol A can be
> useful.
>
> Cheers, Felix
>
> Am 2012-08-26 05:10, schrieb Mia Lueng:
>>
>> Hi All:
>>
>> I bui
another error occurs in oracle :
ORA-00214: control file '/oradata/orcl/control01.ctl' version 79111
inconsistent with file '/oradata/flash_recovery_area/orcl/control02.ctl'
version 79104
Is it sure that protocol A can not keep the oracle's data integration ?
2012/8
I use drbd_trace to trace drbd write operation when running oracle,
it show info like this;
block drbd0: /root/rpmbuild/BUILD/drbd-8.3.13/drbd/drbd_main.c:2152:
drbd0_worker [5323] data >>> Barrier (barrier 435610040)
block drbd0: /root/rpmbuild/BUILD/drbd-8.3.13/drbd/drbd_receiver.c:5005:
drbd0_
ed proxy yet. I just test this on local lan
environment. If the test pass, we will install it on WAN enviroment.
2012/9/3 Lars Ellenberg :
> On Sun, Aug 26, 2012 at 11:10:44AM +0800, Mia Lueng wrote:
>> Hi All:
>>
>> I built a cluster to protect oracle database. The or
Hi :
Since drbd primary/secondary will do quick sync after the broken netlink
recover, the data on secondary is inconsistent during the quick sync. Can I
save the transaction buffer to disk and replay the transaction after the
netlink recover? This can provide the secondary node is always be UpToDa
in drbd 8.4.3，I do the following test:
[root@kvm3 drbd.d]# drbdadm dump drbd0
# resource drbd0 on kvm3: not ignored, not stacked
# defined at /etc/drbd.d/drbd0.res:1
resource drbd0 {
on kvm3 {
device /dev/drbd0 minor 0;
disk /dev/vg_kvm3/drbd0;
met
# sysctl -a|grep dirty
vm.dirty_background_ratio = 10
vm.dirty_background_bytes = 0
vm.dirty_ratio = 20
vm.dirty_bytes = 0
vm.dirty_writeback_centisecs = 500
vm.dirty_expire_centisecs = 3000
bandwidth is 100M bps
2013/5/9 Lars Ellenberg
> On Thu, May 09, 2013 at 12:16:56AM +0800, Mia Lu
drbd configure :
[root@kvm3 ~]# drbdadm dump drbd0
# resource drbd0 on kvm3: not ignored, not stacked
# defined at /etc/drbd.d/drbd0.res:1
resource drbd0 {
on kvm3 {
device /dev/drbd0 minor 0;
disk /dev/vg_kvm3/drbd0;
meta-diskinternal;
drbd configure :
[root@kvm3 ~]# drbdadm dump drbd0
# resource drbd0 on kvm3: not ignored, not stacked
# defined at /etc/drbd.d/drbd0.res:1
resource drbd0 {
on kvm3 {
device /dev/drbd0 minor 0;
disk /dev/vg_kvm3/drbd0;
meta-diskinternal;
I have 16G RAM in this server. Using a low dirty configuration may lead
to a pool I/O performance?
2013/5/14 Lars Ellenberg
> On Thu, May 09, 2013 at 10:33:16AM +0800, Mia Lueng wrote:
> > # sysctl -a|grep dirty
> > vm.dirty_background_ratio = 10
> > vm.dirty
ke_function+0x0/0x40
[] kjournald2+0xb8/0x220 [jbd2]
[] ? autoremove_wake_function+0x0/0x40
[] ? kjournald2+0x0/0x220 [jbd2]
[] kthread+0x96/0xa0
[] child_rip+0xa/0x20
[] ? kthread+0x0/0xa0
[] ? child_rip+0x0/0x20
2013/5/21 Mia Lueng
> drbd configure :
>
> [root@kvm3 ~]# drbdadm du
I think disconnecting drbd before umount and connecting it after umount
is a good idea to avoid this.
2013/6/6 Lars Ellenberg
> On Tue, May 21, 2013 at 11:52:58PM +0800, Mia Lueng wrote:
> > I have 16G RAM in this server. Using a low dirty configuration may lead
> >
I have built a drbd cluster. The storage setting is like the following:
backend LV--->drbd0--->pv-->vg-->userlv
That means I create a drbd device on a LV, and create a volume group on
drbd device again.
In /etc/lvm/lvm.conf, I add a filter so that pvscan do not probe for the
backend LV. This wo
I find a solution :
1. drbdadm sh-ll-dev drbd0 find drbd0's backend lv
2. map lv to dm-x , ls /sys/block/dm-x/holdersto find the frontend lv
3. dmsetup remove -f $frontlv
2013/10/7 Digimer
> On 06/10/13 23:26, Mia Lueng wrote:
> > I have built a drbd cluster. The stor
In my cluster(node1/node2) with drbd, the state in /proc/drbd is
primary/secondary up2date/up2date, but when I change primary to node2 , the
file that existed on node1 can not be found on node2.
Then I do "drbdadm verify drbd0" to verify and resync the data, node2's
data returned to be OK.
I am w
http://www.novell.com/support/kb/doc.php?id=7009306
2013/12/4 Matthieu Lejeune
> Hi,
>
> I was on the DRBD 8.3.13-2 on Debian Wheezy
>
> I have upgraded my debian on Jessie.
> I'm using DRBD 8.4.3 now
> I have push my config files to the new version.
>
> And the verify is ok
>
> Every 1.0s:
Hi all:
Happy new year!
I use drbd 8.3.15 now and I find a problem. The drbd sync rate slow down
during resync . The initial sync rate will be up to 100MB/s(in gigabyte
lan) and become slower and slower during resync . At the end , it will
reach to 20MB/s. But after I disconnect it and connect a
Hi:
I'm just wondering how secondary handle the write ordering when a same
block is written twice on primary.
Application submits these updates: X, Y, Z.
They may or may not be to the same block.
If they are to the same block, then the application, file system
or other layer already makes sure (or
completely.
2015-12-23 12:52 GMT+08:00 Digimer :
> On 22/12/15 11:11 AM, Mia Lueng wrote:
>> Hi:
>> I'm just wondering how secondary handle the write ordering when a same
>> block is written twice on primary.
>>
>> Application submits these updates: X, Y, Z.
>&
How does epoch works? I have examined the source code. when primary
recieves a bio with bi_size=0 or bio num > MAX_EPOCH_SIZE or idle
time exceeds limit , there will be a P_BARRIER packet triggered?
2015-12-24 23:49 GMT+08:00 Lars Ellenberg :
> On Wed, Dec 23, 2015 at 12:11:51AM +080
Hi:
I have a cluster with four drbd devices. I found oracle stopped
timeout while drbd is in resync state.
oracle is blocked like following:
oracle6869 6844 0.0 0.0 71424 12616 ?S16:28
00:00:00 pipe_wait
/oracle/app/oracle/dbhome_1/bin/sqlplus
@/tmp/ora_ommbb_shutdown.sql
oracle
Yes, Oracle & drbd is running under pacemaker just in
primary/secondary mode. I stopped the oracle resource during DRBD is
resyncing and the oracle hangup
2016-08-31 14:38 GMT+08:00 Igor Cicimov :
>
>
> On Wed, Aug 31, 2016 at 3:49 PM, Mia Lueng wrote:
>>
>> Hi:
>
e70d0 R11: 0206 R12: 0001553e0f80
R13: 7f38ac571c60 R14: 7fffc9ee77c0 R15: 7fffc9ee77e0
ORIG_RAX: 00d1 CS: 0033 SS: 002b
2016-09-01 7:48 GMT+08:00 Igor Cicimov :
>
>
> On Thu, Sep 1, 2016 at 9:02 AM, Igor Cicimov
> wrote:
>>
>>
Hi All:
In protocol C, a bio will return to upper application(execute
bi_endio()) when local bio is completed and recieve the data ack
packet from peer. But if a write request to block N was submitted
and written to local disk, but not received the data ack from peer, a
read request to the same
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