Andi abes asked:
> Doesn't that depend on the ratios of read vs write?
> In a read tilted environment (e.g. CDN's, image stores etc), being able to
> dedup at the block level in the
> relatively rare write case seems a boon. The simplification this could allow
> - performing localized dedup
>
On Sun, Mar 11, 2012 at 3:49 PM, Caitlin Bestler
wrote:
> Restricting fingerprinting to blocks would make block level compares
> possible, but as I noted on an earlier reply
> it would *always* require that the blocks be transferred to perform the
> calculation. It is a lot harder to double
> Ne
Joe Gordon asked:
> Can SHA-1 collisions be generated? If so can you point me to the article?
Check Wikipedia on cryptographic hashing and especially "preimage attack"
To summarize, SHA-256 is effectively immune from a pre image attack. Even MD5
is effectiely i
Restricting fingerprinting to blocks would make block level compares possible,
but as I noted on an earlier reply
it would *always* require that the blocks be transferred to perform the
calculation. It is a lot harder to double
Network bandwidth than to double storage. Deduplication that only sav
first then everyone who downloads that ISO will get my altered
>>> copy.
>>>
>>>
>>>
>>> SHA-256 is really needed to make this type of attack infeasible.
>>>
>>>
>>>
>>> I also think that distributed deduplication wor
would be great to hear.
>>
>>
>>
>> From: openstack-bounces+caitlin.bestler=nexenta@lists.launchpad.net
>> [mailto:openstack-bounces+caitlin.bestler=nexenta@lists.launchpad.net]
>> On Behalf Of Paulo Ricardo Motta Gomes
>> Sent: Thursday, March 08, 2012 1
a@lists.launchpad.net
> [mailto:openstack-bounces+caitlin.bestler=nexenta@lists.launchpad.net] On
> Behalf Of Paulo Ricardo Motta Gomes
> Sent: Thursday, March 08, 2012 1:19 PM
> To: openstack@lists.launchpad.net
>
>
> Subject: [Openstack] Enabling data dedupl
exenta@lists.launchpad.net] *On
> Behalf Of *Paulo Ricardo Motta Gomes
> *Sent:* Thursday, March 08, 2012 1:19 PM
> *To:* openstack@lists.launchpad.net
>
> *Subject:* [Openstack] Enabling data deduplication on Swift
>
> ** **
>
> Hello everyone,
>
> ** **
>
er=nexenta@lists.launchpad.net
[mailto:openstack-bounces+caitlin.bestler=nexenta@lists.launchpad.net] On
Behalf Of Paulo Ricardo Motta Gomes
Sent: Thursday, March 08, 2012 1:19 PM
To: openstack@lists.launchpad.net
Subject: [Openstack] Enabling data deduplication on Swift
Hello everyone,
I'
Hello everyone,
I'm a student of the European Master in Distributed Computing (EMDC)
currently working on my master thesis on distributed content-addressable
storage/deduplication.
I'm happy to announce I will be contributing the outcome of my thesis work
to OpenStack by enabling both object-leve
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