[DRBD-user] DRBD with two Virtual machine on on the same PC

Lars Ellenberg lars.ellenberg at linbit.com
Thu Dec 1 20:41:29 CET 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Wed, Nov 30, 2011 at 11:30:33AM +0100, Francesco cuccaro wrote:
> Hi Regads, please help me.
> I'm inexperienced with drbd, for testing purpose I have created two virtual
> machine with drbd 8.4.0(and on the same pc, it's run very well.
> The probelm is the speed sync rate, it does not exceed  100 k/Sec.
> tests were performed with the Vmware NAT and Vmware Bridge connection.
> The hard disk is a ssd, and it write to 300mb/sec.
> Why my sync rate is very slow?
> NC and Iperf are very fast transfert file, why drbd is slow??

It is not.


OK! :)

> version: 8.4.0 (api:1/proto:86-100)
> GIT-hash: 28753f559ab51b549d16bcf487fe625d5919c49c build by dag at Build64R6,
> 2011-08-12 09:40:17
> 0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r-----
>    ns:35646712 nr:0 dw:68 dr:35651401 al:8 bm:2179 lo:1 pe:3 ua:5 ap:0 ep:1
> wo:b oos:19412724
>        [>...................] sync'ed:  7.5% (18956/20472)M
>        finish: 0:04:39 speed: 69,528 (67,448) K/sec

That is almost 70 MByte per second.

"," is the thousands separator.
"." would be the decimal point, but is unused.

: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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