In good tradition, I can answer my own question once again: It seems that InetAddress.getLocalHost() ignores the /etc/resolv.conf, but only looks at the /etc/hosts file (where I hadn’t specified anything besides localhost). Adding the IP and hostname to this file solves the problem and the exception is gone. Another answer is almost correct and I … Read more
Just to clarify, you’re getting 50MB/sec with NFS over a single Gb ethernet connection? And the host server is running CentOS with VMware Server installed, which is in turn running the 7 VMs? Is there a particular reason you’ve gone with CentOS and VMware Server combined, rather than VMware ESXi which is a higher performance … Read more
I recommend a (almost) any SAS/RAID controller that uses the LSI 1068E SAS chip (PCI-E) and supports Initiator-Target mode (JBOD mode). This does not include MegaRAID controllers. I use the a 3442E and Dell 6/iR. LSI SAS 3442E (4 internal – SFF-8484, 4 external – SFF-8470) LSI SAS 3081E (8 internal – SFF-8087) LSI SAS … Read more
Offline drive #1. Replace the old drive with the newer, high-capacity drive. zpool replace the drive. Wait for the replacement to be rebuilt. Goto step 1 and repeat for each successive drive in the array. You may need to export and then import the zpool once this procedure is complete; the pool will then show … Read more
The simple answer is that to mirror something takes almost no processing power – it just writes to the disk a second time. For RAID-Z2, you have to compute an entirely new parity block, which although small CAN bog down the CPU when you have to write large amounts of data quickly. Mirroring is always … Read more