0 blocks free PTR - cannot create new files on the data store

We have been experiencing problems trying to power on virtual machines. When attempting to power on virtual machines, we see the error "cannot extend the pagefile from 0 KB to 2097152 KB".

We checked the .vswp file are created in the folder of the Virtual Machine on the data store. Connection to the ESXi host, we have seen the following in vmkernel.log error message:

(2016 01-16 T 21: 19:40.556Z cpu1:4971732) WARNING: Res3: 6984: "freenas-6-ds": [rt 3] No. Space - has not found enough resources after the second pass! (requis_:_1,_trouvé_:_0) 2016-01 - 16 T 21: 19:40.556Z cpu1:4971732) Res3: 6985: "freenas-6-ds": [rt 3] resources t 0, e 0, PN 16, BM 0, b 0, RCs u 0, i 0, 4031 nf, pe 0, 0 2016-01-16 T 21 oe: 19:40.556Z cpu1:4971732) WARNING: SwapExtend: 683: impossible to extend the pagefile from 0 KB to 2097152 KB.

This was surprising given that we have about 14 TB of space available on the data store:

[root@clueless:~] df h

Size of filesystem used available use % mounted on

VMFS-5 20.0 T 5.4 T 14.6 T/vmfs/volumes/freenas-six-ds 27%

However, when we use "dd" to write a 20 GB file, we would get "no space left on device:

[root@clueless:/vmfs/volumes/55a00d31-3dc0f02c-9803-025056000040/deleteme] dd if = / dev/urandom of = deleteme bs = 1024 count = 2024000

DD: writing "deleteme": no space is available on the device

263734 + 0 records in

out 263733 + 0 reviews

[root@clueless:/vmfs/volumes/55a00d31-3dc0f02c-9803-025056000040/deleteme] ls - lh deleteme

-rw - r - r - 1 root root 19 Jan 255,1 M 01:02 deleteme

We checked that we have free inodes:

The ramdisk name system include in reserved Coredumps used Maximum reserved free use pic free maximum allocated Inodes used Inodes Inodes Mount Point

------------------------------------------------------------------------------------------------------------------------------------------------------------------------

root of true true 32768 KiB 32768 KiB KiB KiB 99% 99% 9472 4096 3575 176 176.

true true etc 28672 KiB 28672 KiB 284 KiB 320 KiB 99% 99% 4096 1024 516/etc

Choose true true 0 KiB KiB 0 KiB KiB 0 100% 0% 8 1024 8192 32768 / opt

var true true 5120 KiB 49152 484 516 99% 90% 8192 384 379 KiB KiB KiB / var

tmp false false 2048 KiB 262144 KiB 20 KiB 360 KiB 99% 99% 8 256 8192/tmp

false false hostdstats KiB 310272 KiB 3076 KiB 3076 KiB 99 0% 0% 8192 32 5/var/lib/vmware/hostd/stats


We believe that our cause is due to have 0 free blocks of PTR:

[root@clueless:/vmfs/volumes/55a00d31-3dc0f02c-9803-025056000040] vmkfstools Pei - v 10/vmfs/volumes/freenas-six-ds.

System file VMFS-5, 61 extending on 1 partition.

File system label (if applicable): freenas-six-ds

Mode: public TTY only

Capacity 21989964120064 (blocks of files 20971264 * 1048576), 16008529051648 (15266923 blocks) prevail, max supported size of the 69201586814976 file

Volume creation time: Fri Jul 10 18:21:37 2015

Files (max / free): 130000/119680

Blocks of PTR (max / free): 64512/0

Void / blocks (max / free): 32000/28323

The secondary blocks of Ptr (max / free): 256/256

Drop blocks (approve/used/approve %): 0/5704341/0

Blocks of PTR (approve/used/approve %): 64512/0/0

Void / blocks (approve/used/approve %): 3677/0/0

Size of volume metadata: 911048704

UUID: 55a00d31-3dc0f02c-9803-025056000040

Logical unit: 55a00d30-985bb532-BOI.30-025056000040

Partitions split (on 'lvm'):

NAA.6589cfc0000006f3a584e7c8e67a8ddd:1

Instant native is Capable: YES

OBJLIB-LIB: ObjLib cleaned.

WORKER: asyncOps = 0 maxActiveOps = 0 maxPending = 0 maxCompleted = 0

When we turn off a virtual machine, it will release 1 block of PTR and we would be able to on another VM / create the 20 GB file using "dd". Once we reached 0 free blocks of PTR, we are unable to create new files.

Can anyone give any suggestions on how we may be able to clear the blocks PTR? We have already tried to restart all services of management on all ESXi hosts connected.

FreeNAS is not running on a virtual machine.

We solved the problem by finding a lot PTR blocks have been used by many of our models of virtual machine. Remove the disk models solved the problem.

Tags: VMware

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