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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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