25 November 2018

25th of November

Farm status
Intel GPUs
All running Einstein O1OD1 work overnight

Nvidia GPUs
Two running Einstein O1OD1 work overnight

Raspberry Pis
Twelve running Einstein BRP4 work

Increased storage capacity
I purchased 3 WD Red 8TB disks to put into the Drobo (its used to backup the storage server). This brings the Drobo up to 16TB of usable space.

At the same time I purchased 3 Toshiba 8TB disks to put in the storage server. I have a new disk controller on order that supports up to 8 drives and will swap the drives around when installing it. The idea is to have a vdev of 3 drives in raidz1 which will give single drive redundancy and more than 16TB of disk space due to compression. I can then add more drives as needed.

Disk performance
While doing some online research I came across the gnome-disk-utility that can benchmark disk performance so I let it loose on a few different drives that I have. Interestingly the Seagate expansion drives had a high transfer speed and the SSHD came in the slowest for transfer speed and 2nd slowest for seek time. I haven't benchmarked the NVMe SSD yet.

Drive model Type Interface Ave read (MB/sec) Ave seek (msec)
Samsung 850 Pro 2.5" SSD SATA 521.7 0.05
WD10j31x 2.5" SSHD SATA 89.8 17.31
WD2002FAEX 3.5" HDD SATA 124.2 12.78
WD4000F9YZ 3.5" HDD SATA 137.3 14.32
Seagate expansion 3TB 3.5" HDD USB 3 158.8 17.51
Seagate expansion 2TB 3.5" HDD USB 3 139.6 15.42

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