Date: Sat, 19 Apr 2014 11:27:08 +0200 From: Rainer Duffner <rainer@ultra-secure.de> To: FreeBSD FS <freebsd-fs@freebsd.org> Subject: zfs sends "hang" recipient? Message-ID: <16C5BA3C-2E32-4BD6-93AC-8640D8CEF060@ultra-secure.de>
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Hi, I=92ve got a FreeBSD 9.1 server that does zfs sends (via zxfer from = ports) to a FreeBSD 10.0 server. All AMD64, the pool is some 6T, 50% = full. Sender has 144GB RAM, recipient has 192GB. The snapshots are done with one of the tools in the ports (can=92t = remember the name right now, I=92ve basically tried them all). During the send process (with takes 5 to 15 minutes), the receiving host = is blocking all commands involving filesystems. Stuff like df, or zpool list hangs until the receive has completed. Is this a known problem? Would it help upgrading the 9.1 server to 10.0, too? In this setup, I=92m really conservative regarding upgrades, as I have = very little downtime. I=92ve got a MySQL database on the receiving server (not on the same = filesystem, of course, but on the same pool) that functions normally. I could ignore this, but our statistics-gathering tool relies on stuff = like the above and is completely b0rked by the hangs (which I could = ignore again, if it wasn=92t for the customer who wanted these = statistics, too=85) Rainer=
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