Sorry for the long title post. I just want to easily distinguish this post from my other ZFS post. The reason? For this week, I’ll be working on a server with ZFS filesystem and looks like the SAs for the servers is not yet familiar with the filesystem. I am the newest member of the UNIX team and there’s this request to grow a filesystem that is directly mounted from a disk slice.. Told the guy that we may need to modify the disk geometry and we may have to repartition the disk.. Then I noticed that there is a 140G disk under ZFS partition. I will convince the user to use that spare disk for his project.<\/p>\n
And here are the cheat sheet for ZFS\/zpool that is related to this week’s project.<\/p>\n
<\/p>\n
The whole exaple uses virtual devices.. that is chucks of files that represents disk.. of course if you have physical disk available, you may use those.<\/p>\n
Here’s how to create “virtual devices\u201d or vdevs as described in the zpool documentation. These can also be real disk slices if you have them available.<\/p>\n
Here’s how to create a storage pool and check the size and usage.<\/p>\n When you created a disk pool, you can create a ZFS Filesystem which also in turn,<\/p>\n Create a second file system. Note that both file system show 159M available because no quotas are set. Each \u201ccould\u201d grow to fill the pool.<\/p>\n # zfs create myzfs\/colin2 Reserve a specified amount of space for a file system ensuring that other users don\u2019t take up all the space. <\/p>\n # zfs set reservation=20m myzfs\/colin Set and view quotas <\/p>\n # zfs set quota=20m myzfs\/colin2 Destroy a filesystem<\/p>\n # zfs destroy myzfs\/colin2 That’s what I need for now.. will continue addiction ZFS cheat sheet if needed.. Pardon me, but my primary use of this blog site is for my use \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":" Sorry for the long title post. I just want to easily distinguish this post from my other ZFS post. The reason? For this week, I’ll be working on a server with ZFS filesystem and looks …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[91],"tags":[387,322,220],"class_list":["post-192","post","type-post","status-publish","format-standard","hentry","category-zfs","tag-zfs","tag-zfs-filesystem","tag-zpool"],"_links":{"self":[{"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/posts\/192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/comments?post=192"}],"version-history":[{"count":1,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/posts\/192\/revisions"}],"predecessor-version":[{"id":193,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/posts\/192\/revisions\/193"}],"wp:attachment":[{"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/media?parent=192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/categories?post=192"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sysadmindayph.com\/blog\/wp-json\/wp\/v2\/tags?post=192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}$ su
\nPassword:
\n# cd \/
\n# mkfile 100m disk1 disk2 disk3 disk5
\n# mkfile 50m disk4
\n# ls -l disk*
\n-rw------T 1 root root 104857600 Sep 11 12:15 disk1
\n-rw------T 1 root root 104857600 Sep 11 12:15 disk2
\n-rw------T 1 root root 104857600 Sep 11 12:15 disk3
\n-rw------T 1 root root 52428800 Sep 11 12:15 disk4
\n-rw------T 1 root root 104857600 Sep 11 12:15 disk5
\n<\/code><\/p>\n# zpool create myzfs \/disk1 \/disk2
\n# zpool list
\nNAME SIZE USED AVAIL CAP HEALTH ALTROOT
\nmyzfs 191M 94K 191M 0% ONLINE -<\/code><\/p>\n
\n# zfs list
\nNAME USED AVAIL REFER MOUNTPOINT
\nmyzfs 172K 159M 21K \/myzfs
\nmyzfs\/colin 18K 159M 18K \/myzfs\/colin
\nmyzfs\/colin2 18K 159M 18K \/myzfs\/colin2<\/p>\n
\n# zfs list -o reservation
\nRESERV
\n none
\n 20M
\n none<\/p>\n
\n# zfs list -o quota myzfs\/colin myzfs\/colin2
\nQUOTA
\n none
\n 20M<\/p>\n
\n# zfs list
\nNAME USED AVAIL REFER MOUNTPOINT
\nmyzfs 20.1M 139M 22K \/myzfs
\nmyzfs\/colin 18K 159M 18K \/myzfs\/colin
\nmyzfs\/colin@test 0 – 18K –
\nmyzfs\/colin3 0 139M 18K \/myzfs\/colin3<\/p>\n