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Mon Jul 24 06:54:04 EDT 2017 Slept from ten-thirty to six-thirty. Woke briefly round three. High of seventy-three. Mostly cloudy. 20% chance of rain. Work: - Review invoices Done. - Run DHCP server on a bridge? - Study network namespaces Done. # virsh domstats myvm # apt-get install virt-top https://access.redhat.com/solutions/454523 How do I configure Red Hat Gluster Storage bricks for optimal volume functionality and performance? - RAID 6 or RAID 10 (1+0) with 12 physical disks per LUN - For RAID 10, a stripe element size of 256KiB is recommended - 1 RAID LUN per brick > When creating a Physical Volume, the data alignment should be set to correspond with the RAID stripe size. In this example, to align with an underlying RAID 6 stripe element size of 128k across 12 disks (10 data disks)3, the --dataalignment value will be a multiple of these: 128k x 10 = 1280k: # pvcreate --dataalignment 1280k /dev/sdb > Create the LVM physical volume on the whole block device, rather than on a partition. Using partitions can result in loss of data alignment and increased I/O contention, leading to reduced performance. > Confirm the data alignment with the pvs command: pvs -o +pe_start --units k - When creating the XFS filesystems for bricks, a minimum inode size of 512 bytes is required to accommodate GlusterFS metadata. - The stripe unit (su) and stripe width (sw) values should be set to match the underlying physical volume and RAID configurations. - When mounting the XFS brick filesystem, the inode64 and noatime options should be used. Twenty minute walk at lunch. Saw a seagull, robins, and a couple of morning doves. The cool cloudy weather is a nice break. https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/pdf/Networking_Guide/Red_Hat_Enterprise_Linux-7-Networking_Guide-en-US.pdf Home: - Install OpenBSD on new firewall Done. The new Intel NUC didn't like the RAM I ordered. Had to run up to MicroCenter to grab a different stick. Stopped at that GOB comics and game shop on my way home. They moved to 14 Mile, east of Rochester. Still not a fan of the place, but their new location is less cramped. Lunch: coffee, carrots, peanut butter and jelly Dinner: sausage and pepper sandwich, strawberry icecream

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