Re: [Nbd] NBD, sparse files & TRIM
- To: folkert <folkert@...421...>
- Cc: Wouter Verhelst <w@...112...>, nbd-general@...72...
- Subject: Re: [Nbd] NBD, sparse files & TRIM
- From: Paul Clements <paul.clements@...856...>
- Date: Wed, 5 Jan 2011 11:02:22 -0500
- Message-id: <AANLkTimAOFJk=SJzfrJSYy1ZMHrZwY5d6TTNxbG8Zj5s@...18...>
- In-reply-to: <20110105155250.GE3629@...855...>
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2011/1/5 folkert <folkert@...421...>:
> An other enhancement could be:
> - compression (when cpu is faster than network connection)
> - not sending 0x00 pages but some flag in the responsheader indicating
> an all 0x00 page
Generic compression takes care of this pretty well. I think zlib ends
up doing like a 1000 to 1 compression on a largish block of zeroes.
You can tunnel the nbd connection through a compression layer to
achieve this, which does help in low bandwidth situations.
--
Paul
>
> Folkert van Heusden
>
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