Thank you for all the messages, I read few messages of the solution " falconstore " VTL of storagetek. Do you think that the DSSU will replace the solutions VTL ?
Didier Hampus Lind a écrit : >Hi, > >Here in Sweden Diligent is pretty cheap I think, or at least at the same >level as other vendors. But of course management people can twist things the >other way... > >Did you go with another VTL/de-dup solution instead? > >Hampus Lind >Rikspolisstyrelsen >National Police Board >Tel dir: +46 (0)8 - 401 99 43 >Tel mob: +46 (0)70 - 217 92 66 >E-mail: [EMAIL PROTECTED] > > >-----Ursprungligt meddelande----- >Från: Martin, Jonathan (Contractor) [mailto:[EMAIL PROTECTED] >Skickat: den 15 september 2006 15:33 >Till: Hampus Lind; Paul Keating; [EMAIL PROTECTED]; >[EMAIL PROTECTED] >Kopia: veritas-bu@mailman.eng.auburn.edu >Ämne: RE: [Veritas-bu] problems with VTL StorageTek solution ? > > >We were looking at an offsite backup solution w/ Diligent here and everyone >we talked to (Local Reseller, Diligent Sales & Technical resources) said our >HDS AMS500 w/ SATA Shelves would be fine. In the end we balked at the >Diligent Protectier software cost and went another way but cost aside this >solution was our best choice. > >-Jonathan > > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Hampus Lind >Sent: Friday, September 15, 2006 9:12 AM >To: 'Paul Keating'; [EMAIL PROTECTED]; >[EMAIL PROTECTED] >Cc: veritas-bu@mailman.eng.auburn.edu >Subject: Re: [Veritas-bu] problems with VTL StorageTek solution ? > >Hi, > >ProtecTier on work over FC protocol but I have never heard that it require >FC disk... When I meet with diligent people from Israel, I told them that we >already have 7 TB of SATA that we which to "re-use", that would be no >problem, they said. > >They only support FC arrays today, but in that array you can have both FC >and SATA drives. It feels strange creating a backup-to-disk solution that >only support FC disks... > >The guy selling you ProtecTier, does he work at HDS and want you to buy a >solution that includes expensive FC disks?? ;-) > >I think you need to find another source to Diligent, or perhaps I need to >find one that tells me the truth.. :-) > > > > > >Hampus Lind >Rikspolisstyrelsen >National Police Board >Tel dir: +46 (0)8 - 401 99 43 >Tel mob: +46 (0)70 - 217 92 66 >E-mail: [EMAIL PROTECTED] > > >-----Ursprungligt meddelande----- >Från: Paul Keating [mailto:[EMAIL PROTECTED] >Skickat: den 15 september 2006 14:51 >Till: Hampus Lind; [EMAIL PROTECTED]; >[EMAIL PROTECTED] >Kopia: veritas-bu@mailman.eng.auburn.edu >Ämne: RE: [Veritas-bu] problems with VTL StorageTek solution ? > >I like the look of the ProtecTIER product. > >However, I've come up with some information that I can't get a hard answer >on. >The info I got from Diligent coonfused me even more. > >Everything I can find, and am told by either HDS, or Diligent says that >Protectier requires FC disk.......as in, not SATA...... > >I find this confusing.....sure the data de-duplication technology requires >knowing where the data is on disk, quickly, etc, etc. So I said to the >Diligent rep I spoke with "Ok, so the de-duplication algorithm actually has >to search the disk to find patterns?" to which I got the response >(paraphrasing)"Oh no, of course not...all of the data on disk is mapped in >RAM, we can map 1PB of disk in 4GB of RAM. The appliance doesn't need to >read the disk to find hash matches, etc. All of that is done in RAM and only >the unique data that needs to be written to disk is written to disk". >So I asked why then would FC disk be necessary??? >After pushing it a bit, I got a response that Yes, it would technically >"work" with SATA disk, however there would be a performance hit due to >SATA's transfer speed, of approx 40%, so they don't support SATA. > >So....here's my confusion....since the de-duplication is being done "in >stream" on the appliance before the data ever gets to the disk array, then >with the advertised 25:1 ratio, only 4% of the data hitting the box is >getting written to disk. > >Even if the SATA disk is 80% slower that FC (being fascetious here), >shouldn't it still be like 5 times faster than another product that writes >"everything" to SATA disk? Yes all the other VTL vendors are basing their >products on SATA (as Diligent is with their VTF Open >product) > > >Paul > > _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu