I ran the RealLife iometer profile on NFS based storage (vs. SW iSCSI), and got nearly identical results to having the disks on iSCSI:
iSCSI IOPS: 1003.8 MB/s: 7.8 Avg Latency (s): 27.9 NFS IOPS: 1005.9 MB/s: 7.9 Avg Latency (s): 29.7 Interesting! Here is how the pool was behaving during the testing. Again this is NFS backed storage: data01 122G 20.3T 166 63 2.80M 4.49M data01 122G 20.3T 145 59 2.28M 3.35M data01 122G 20.3T 168 58 2.89M 4.38M data01 122G 20.3T 169 59 2.79M 3.69M data01 122G 20.3T 54 935 856K 18.1M data01 122G 20.3T 9 7.96K 183K 134M data01 122G 20.3T 49 3.82K 900K 61.8M data01 122G 20.3T 160 61 2.73M 4.23M data01 122G 20.3T 166 63 2.62M 4.01M data01 122G 20.3T 162 64 2.55M 4.24M data01 122G 20.3T 163 61 2.63M 4.14M data01 122G 20.3T 145 54 2.37M 3.89M data01 122G 20.3T 163 63 2.69M 4.35M data01 122G 20.3T 171 64 2.80M 3.97M data01 122G 20.3T 153 67 2.68M 4.65M data01 122G 20.3T 164 66 2.63M 4.10M data01 122G 20.3T 171 66 2.75M 4.51M data01 122G 20.3T 175 53 3.02M 3.83M data01 122G 20.3T 157 59 2.64M 3.80M data01 122G 20.3T 172 59 2.85M 4.11M data01 122G 20.3T 173 68 2.99M 4.11M data01 122G 20.3T 97 35 1.66M 2.61M data01 122G 20.3T 170 58 2.87M 3.62M data01 122G 20.3T 160 64 2.72M 4.17M data01 122G 20.3T 163 63 2.68M 3.77M data01 122G 20.3T 160 60 2.67M 4.29M data01 122G 20.3T 165 65 2.66M 4.05M data01 122G 20.3T 191 59 3.25M 3.97M data01 122G 20.3T 159 65 2.76M 4.18M data01 122G 20.3T 154 52 2.64M 3.50M data01 122G 20.3T 164 61 2.76M 4.38M data01 122G 20.3T 154 62 2.66M 4.08M data01 122G 20.3T 160 58 2.71M 3.95M data01 122G 20.3T 84 34 1.48M 2.37M data01 122G 20.3T 9 7.27K 156K 125M data01 122G 20.3T 25 5.20K 422K 84.3M data01 122G 20.3T 170 60 2.77M 3.64M data01 122G 20.3T 170 63 2.85M 3.85M So it appears NFS is doing syncs, while iSCSI is not (See my earlier zpool iostat data for iSCSI). Isn't this what we expect, because NFS does syncs, while iSCSI does not (assumed)? -Scott -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
