extend swap space
I have a RHEL box with 16G Ram and 8G swap. I want to extend the swap space to 16G (+8G).
There is not enough space for extending swap lvm so I would like to reallocate some space from /home to swap.
Please kindly advise the steps by steps for this reallocation.
Version : RHEL 7.2 workstation
$ df Filesystem 1K-blocks Used Available Use% Mounted on /dev/mapper/rhel-root 52403200 8841648 43561552 17% / devtmpfs 8063804 0 8063804 0% /dev tmpfs 8080448 24 8080424 1% /dev/shm tmpfs 8080448 429828 7650620 6% /run tmpfs 8080448 0 8080448 0% /sys/fs/cgroup /dev/nvme0n1p2 508588 212216 296372 42% /boot /dev/nvme0n1p1 204580 9964 194616 5% /boot/efi /dev/mapper/rhel-home 188561452 63225364 125336088 34% /home tmpfs 1616092 136 1615956 1% /run/user/1000 /dev/sda1 3947824 3947824 0 100% /run/media/xxxx/RHEL-7.2 Server.x86_64 $ sudo lvdisplay [sudo] password for xxxx: --- Logical volume --- LV Path /dev/rhel/swap LV Name swap VG Name rhel LV UUID nztdi1-tX67-eH1e-5W9K-r6LZ-yJYX-MM5dhm LV Write Access read/write LV Creation host, time localhost, 2018-04-07 19:19:21 +0800 LV Status available # open 2 LV Size 7.81 GiB Current LE 2000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Logical volume --- LV Path /dev/rhel/home LV Name home VG Name rhel LV UUID YS62cD-arv7-OJEo-D60g-eavo-Kklu-K6WPzz LV Write Access read/write LV Creation host, time localhost, 2018-04-07 19:19:21 +0800 LV Status available # open 1 LV Size 179.91 GiB Current LE 46058 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2 --- Logical volume --- LV Path /dev/rhel/root LV Name root VG Name rhel LV UUID fAyjNt-XULs-SS61-7QrX-JLO8-aXZF-9eHGmx LV Write Access read/write LV Creation host, time localhost, 2018-04-07 19:19:22 +0800 LV Status available # open 1 LV Size 50.00 GiB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 $ sudo vgs VG #PV #LV #SN Attr VSize VFree rhel 1 3 0 wz--n- 237.79g 64.00m
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