Yes, our LAN Free goes directly to physical tape, namely 3590E in a 3494 library.
David >>> Charles A Hart <[EMAIL PROTECTED]> 10/17/2006 9:21 AM >>> David, Was your 4-5 times faster going direct to a Physical Tape Drive? I ask as we are moving to all Virtual Tape we are finding the LAN Free backups to any of the VTL Heads (Dilligent / Falcon Store etc) become the bottleneck. I can see a stream to a 3592 or maybe an LTO3 drive do better than a VTL based LanFree. I wish someone would make a VTL Head on a Unix box, there's just not the I/O capacity in these Intel/AMD based linux VTL heads.... Regards, Charles Hart UHT - Data Protection David E Ehresman <[EMAIL PROTECTED]> Sent by: "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> 10/16/2006 01:15 PM Please respond to "ADSM: Dist Stor Manager" <ADSM-L@VM.MARIST.EDU> To ADSM-L@VM.MARIST.EDU cc Subject Re: [ADSM-L] Question about LanFreeBackup My experience has been different. Lan Free backups of our Oracle databases run 4 to 5 times faster than over our lan. Systems with lots of small files to backup did not show much improvement going lan free. David Ehresman >>> Mark Stapleton <[EMAIL PROTECTED]> 10/16/2006 2:01 PM >>> From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Anker Lerret >> Remember that LAN-free backups are often no faster >> than 100MB/1GB Ethernet LAN-based backups. (In a few >> cases they will actually be slower.) > >Mark, can you say some more about that? We're hoping to start doing >LAN-free and I was hoping that we could see some nice improvements in >large backups that go straight to tape. Are you just talking about the >case where the LAN is relatively uncongested and the SAN is overloaded? >Or is there something else I'm missing? I can't say that I've got quantifiable data; I speak from real-world experience. SAN-based data transfer from disk to tape has been, in the best of situations, only slightly faster than similar LAN-based data transfer. As I said earlier, the only advantages I've ever seen to LAN-free backups have been 1. where the LAN is too congested (or poorly configured) to guantee reasonable backup speeds 2. the disk storage pool is too small to handle large file backups. 3. you want to guarantee that an entire node's backups go directly to tape -- Mark Stapleton ([EMAIL PROTECTED]) Senior TSM engineer This e-mail, including attachments, may include confidential and/or proprietary information, and may be used only by the person or entity to which it is addressed. If the reader of this e-mail is not the intended recipient or his or her authorized agent, the reader is hereby notified that any dissemination, distribution or copying of this e-mail is prohibited. If you have received this e-mail in error, please notify the sender by replying to this message and delete this e-mail immediately.
