On Mar 11, 2010, at 2:00 AM, Svein Skogen wrote: > I can't help but keep wondering if not some sort of FEC wrapper (optional of > course) might solve both the "backup" and some of the long-distance-transfer > (where retransmissions really isn't wanted) issues.
I don't think retransmissions of b0rken packets is a problem anymore, most people use ssh which provides good error detection at a fine grain. It is rare that one would need to resend an entire ZFS dump stream when using ssh (or TLS or ...) Archival tape systems are already designed to wrap the payload with ECC. For example, the T10000b is rated at 30 year shelf life and 10^-19 BER -- 4 orders of magnitude better than enterprise class HDDs and 5 orders of magnitude better than consumer class HDDs. Also, many enterprise backup solutions have long-term tape management as part of their core feature set. A well designed, enterprise class backup system should be easily capable of storing ZFS dump images reliably, safely, and securely. -- richard ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance http://nexenta-atlanta.eventbrite.com (March 16-18, 2010) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
