Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
My drbd replication channel is dedicated crossovered gigabit nic
Thank you for any confirmation.
Robert
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-----Original Message-----
From: drbd-user-request at lists.linbit.com
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Date: Fri, 13 Aug 2010 12:00:02
To: <drbd-user at lists.linbit.com>
Reply-To: drbd-user at lists.linbit.com
Subject: drbd-user Digest, Vol 73, Issue 15
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Today's Topics:
1. Re: Initial sync, just want to confirm the process (and not
go down in a blaze of glory) (Simon Billis)
2. Re: Initial sync, just want to confirm the process (and not
go down in a blaze of glory) (Simon Billis)
3. Disk I/O direct vs. Drbd (roberto.fastec at gmail.com)
4. Re: Disk I/O direct vs. Drbd (Bart Coninckx)
----------------------------------------------------------------------
Message: 1
Date: Fri, 13 Aug 2010 09:24:22 +0100
From: "Simon Billis" <simon at houxou.com>
Subject: Re: [DRBD-user] Initial sync, just want to confirm the
process (and not go down in a blaze of glory)
To: "'Lars Ellenberg'" <lars.ellenberg at linbit.com>,
<drbd-user at lists.linbit.com>
Message-ID: <00ce01cb3ac0$ef21e960$cd65bc20$@com>
Content-Type: text/plain; charset="iso-8859-1"
Lars Ellenberg sent a missive on?2010-08-13:
> On Fri, Aug 13, 2010 at 07:00:50AM +0100, Simon Billis wrote:
>> Hi,
>>> Subject: Re: [DRBD-user] Initial sync, just want to confirm the
>>> process (and not go down in a blaze of glory)
>>>
>>> Hmm sorry Dan, but this has left me a little confused. As I said in my
>>> first post, storage00 is LIVE and has around 4TB of data on it, I have
>>> a dedicated gigabit NIC for drbd, (the machine has 6 network cards in
>>> it, 4 for MPIO iSCSI, 1 for managment/heartbeat, 1 for DRBD) I have
>>> already setup storage01 and have issued drbdadm create-md meta and
>>> drbdadm create-md data on the secondary machine, I haven't started
>>> drbd on it as it needs to be rebooted first, hence why I'm now a
>>> little cautious on the reboot of the machine.
>>
>> I'm not sure why you will need to reboot, you should be able to
>> bring the drbd resource into secondary mode right away with the
>> following commands
>>
>> #On the primary node (storage00) check the status with drbdadm
>> status
>>
>> #You should see something like:
>> [root at raid-primary ~]# drbdadm status <drbd-status version="8.3.8"
>> api="88"> <resources config_file="/etc/drbd.conf"> <resource
>> minor="1" name="drbd1"
>> cs="StandAlone" ro1="Primary" ro2="Unknown"
>> ds1="UpToDate" ds2="DUnknown" />
>
> Uh.
>
> !?
>
> Why would you voluntarily parse pseudo-xml with your eyes?
> That output is meant to be consumed by scripts or the DRBD MC Gui.
>
> Try:
> # drbd-overview
> or
> # cat /proc/drbd
> or
> # grep cs: /proc/drbd
>
Thanks for the suggestion - I agree it's easier to read. Live and learn :-)
------------------------------
Message: 2
Date: Fri, 13 Aug 2010 09:27:55 +0100
From: "Simon Billis" <simon at houxou.com>
Subject: Re: [DRBD-user] Initial sync, just want to confirm the
process (and not go down in a blaze of glory)
To: "'Simon Billis'" <simon at houxou.com>, "'Lars Ellenberg'"
<lars.ellenberg at linbit.com>, <drbd-user at lists.linbit.com>
Message-ID: <00cf01cb3ac1$6e19e100$4a4da300$@com>
Content-Type: text/plain; charset="iso-8859-1"
Simon Billis sent a missive on?2010-08-13:
> Lars Ellenberg sent a missive on?2010-08-13:
>>> #You should see something like:
>>> [root at raid-primary ~]# drbdadm status <drbd-status version="8.3.8"
>>> api="88"> <resources config_file="/etc/drbd.conf"> <resource
>>> minor="1" name="drbd1"
>>> cs="StandAlone" ro1="Primary" ro2="Unknown"
>>> ds1="UpToDate" ds2="DUnknown" />
>>
>> Uh.
>>
>> !?
>>
>> Why would you voluntarily parse pseudo-xml with your eyes?
>> That output is meant to be consumed by scripts or the DRBD MC Gui.
>>
>> Try:
>> # drbd-overview
>> or
>> # cat /proc/drbd
>> or
>> # grep cs: /proc/drbd
>>
>
> Thanks for the suggestion - I agree it's easier to read. Live and learn
> :-)
I guess that it comes from using earlier versions of drbd than 8 :-) - just
goes to show RTFM ;-)
------------------------------
Message: 3
Date: Fri, 13 Aug 2010 08:42:13 +0000
From: roberto.fastec at gmail.com
Subject: [DRBD-user] Disk I/O direct vs. Drbd
To: drbd-user at lists.linbit.com
Message-ID:
<1936187021-1281688929-cardhu_decombobulator_blackberry.rim.net-1512612866- at bda035.bisx.produk.on.blackberry>
Content-Type: text/plain; charset="Windows-1252"
In my linux system, I/O expecially write speed is 90MB/sec
Installing drbd makes it slow to 30MB/sec.
I suppose that drbd tracking and logs processes are obviously write and read consumers.
My question is if you confirm that this ratio 90MB/sec that slows to 30 is to be considered as expected with drbd in between.
The configuration of both the pcs is 1 sata drive for linux and 1 sata drive for drbd.
Please also note that I have not set any value for al-extents.
Thank you
Robert
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------------------------------
Message: 4
Date: Fri, 13 Aug 2010 10:47:49 +0200
From: Bart Coninckx <bart.coninckx at telenet.be>
Subject: Re: [DRBD-user] Disk I/O direct vs. Drbd
To: drbd-user at lists.linbit.com, roberto.fastec at gmail.com
Message-ID: <201008131047.49813.bart.coninckx at telenet.be>
Content-Type: Text/Plain; charset="windows-1252"
On Friday 13 August 2010 10:42:13 roberto.fastec at gmail.com wrote:
> In my linux system, I/O expecially write speed is 90MB/sec
>
> Installing drbd makes it slow to 30MB/sec.
>
> I suppose that drbd tracking and logs processes are obviously write and
> read consumers.
>
> My question is if you confirm that this ratio 90MB/sec that slows to 30 is
> to be considered as expected with drbd in between.
>
> The configuration of both the pcs is 1 sata drive for linux and 1 sata
> drive for drbd.
>
> Please also note that I have not set any value for al-extents.
>
> Thank you
> Robert
> Le mail ti raggiungono ovunque con BlackBerry? from Vodafone!
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
>
That is way too slow. What is your network situation in between the two?
------------------------------
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