Skip site navigation (1)Skip section navigation (2) 
Date:      Fri, 03 May 2013 17:03:32 -0700
From:      Mike Carlson <mike@bayphoto.com>
To:        Adam Nowacki <nowakpl@platinum.linux.pl>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: zfs issue - disappearing data
Message-ID:  <51845054.3020302@bayphoto.com>
In-Reply-To: <51843D0E.2020907@platinum.linux.pl>
References:  <5183F739.2040908@bayphoto.com> <51843D0E.2020907@platinum.linux.pl>
next in thread | previous in thread | raw e-mail | index | archive | help 

[-- Attachment #1 --]
Interesting.

Is that why zdb shows so many objects?

Is this a configuration mistake, and would it lead to data loss?

Can I provide any addition information ?

Mike C

On 5/3/2013 3:41 PM, Adam Nowacki wrote:
> Looks like we have a leak with extended attributes:
>
> # zfs create -o mountpoint=/test root/test
> # touch /test/file1
> # setextattr user test abc /test/file1
> # zdb root/test
>     Object  lvl   iblk   dblk  dsize  lsize   %full  type
>          8    1    16K    512      0    512    0.00  ZFS plain file
>          9    1    16K    512     1K    512  100.00  ZFS directory
>         10    1    16K    512    512    512  100.00  ZFS plain file
>
> object 8 - the file,
> object 9 - extended attributes directory,
> object 10 - value of the 'test' extended attribute
>
> # rm /test/file1
> # zdb root/test
>
>     Object  lvl   iblk   dblk  dsize  lsize   %full  type
>         10    1    16K    512    512    512  100.00  ZFS plain file
>
> objects 8 and 9 are deleted, object 10 is still there (leaked).
>
> On 2013-05-03 19:43, Mike Carlson wrote:
>> We had a critical issue with a zfs server that exports shares via samba
>> (3.5) last night
>>
>> system info:
>> uname -a
>>
>>     FreeBSD zfs-1.discdrive.bayphoto.com 9.1-RELEASE FreeBSD 9.1-RELEASE
>>     #0 r243825: Tue Dec  4 09:23:10 UTC 2012
>>     root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
>>
>> zpool history:
>>
>>     History for 'data':
>>     2013-02-25.17:11:37 zpool create data raidz /dev/gpt/disk1.nop
>>     /dev/gpt/disk2.nop /dev/gpt/disk3.nop /dev/gpt/disk4.nop
>>     2013-02-25.17:11:41 zpool add data raidz /dev/gpt/disk5.nop
>>     /dev/gpt/disk6.nop /dev/gpt/disk7.nop /dev/gpt/disk8.nop
>>     2013-02-25.17:11:47 zpool add data raidz /dev/gpt/disk9.nop
>>     /dev/gpt/disk10.nop /dev/gpt/disk11.nop /dev/gpt/disk12.nop
>>     2013-02-25.17:11:53 zpool add data raidz /dev/gpt/disk13.nop
>>     /dev/gpt/disk14.nop /dev/gpt/disk15.nop /dev/gpt/disk16.nop
>>     2013-02-25.17:11:57 zpool add data raidz /dev/gpt/disk17.nop
>>     /dev/gpt/disk18.nop /dev/gpt/disk19.nop /dev/gpt/disk20.nop
>>     2013-02-25.17:12:02 zpool add data raidz /dev/gpt/disk21.nop
>>     /dev/gpt/disk22.nop /dev/gpt/disk23.nop /dev/gpt/disk24.nop
>>     2013-02-25.17:12:08 zpool add data spare /dev/gpt/disk25.nop
>>     /dev/gpt/disk26.nop
>>     2013-02-25.17:12:15 zpool add data log /dev/gpt/log.nop
>>     2013-02-25.17:12:19 zfs set checksum=fletcher4 data
>>     2013-02-25.17:12:22 zfs set compression=lzjb data
>>     2013-02-25.17:12:25 zfs set aclmode=passthrough data
>>     2013-02-25.17:12:30 zfs set aclinherit=passthrough data
>>     2013-02-25.17:13:25 zpool export data
>>     2013-02-25.17:15:33 zpool import -d /dev/gpt data
>>     2013-03-01.12:31:58 zpool add data cache /dev/gpt/cache.nop
>>     2013-03-15.12:22:22 zfs create data/XML_WORKFLOW
>>     2013-03-27.12:05:42 zfs create data/IMAGEQUIX
>>     2013-03-27.13:32:54 zfs create data/ROES_ORDERS
>>     2013-03-27.13:32:59 zfs create data/ROES_PRINTABLES
>>     2013-03-27.13:33:21 zfs destroy data/ROES_PRINTABLES
>>     2013-03-27.13:33:26 zfs create data/ROES_PRINTABLE
>>
>> We had a file structure drop off:
>>
>> /data/XML_WORKFLOW/XML_ORDERS/
>>
>> around 5/2/2012 @ 17:00
>>
>> In that directory, there were a few thousand directories (containing
>> images and a couple metadata text/xml files)
>>
>> What is odd, is doing a du -h in the parent XML_WORKFLOW directory, only
>> reports ~150MB:
>>
>>       # find . -type f |wc -l
>>     86
>>     # du -sh .
>>     130M .
>>
>>
>> however, df reports 1.5GB:
>>
>>     # df -h .
>>     Filesystem Size Used Avail Capacity Mounted on
>>     data/XML_WORKFLOW 28T 1.5G 28T 0% /data/XML_WORKFLOW
>>
>> zdb -d shows:
>>
>>     # zdb -d data/XML_WORKFLOW
>>     Dataset data/XML_WORKFLOW [ZPL], ID 139, cr_txg 339633, 1.53G,
>>     212812 objects
>>
>> Digging further into zdb, the path is missing for most of those objects:
>>
>>     # zdb -ddddd data/XML_WORKFLOW 635248
>>     Dataset data/XML_WORKFLOW [ZPL], ID 139, cr_txg 339633, 1.53G,
>>     212812 objects, rootbp DVA[0]=<5:b274264000:2000>
>>     DVA[1]=<0:b4d81a8000:2000> [L0 DMU objset] fletcher4 lzjb LE
>>     contiguous unique double size=800L/200P birth=1202311L/1202311P
>>     fill=212812 
>> cksum=16d24fb5aa:6c2e0aff6bc:129af90fe2eff:2612f938c5292b
>>
>>     Object lvl iblk dblk dsize lsize %full type
>>     635248 1 16K 512 6.00K 512 100.00 ZFS plain file
>>     168 bonus System attributes
>>     dnode flags: USED_BYTES USERUSED_ACCOUNTED
>>     dnode maxblkid: 0
>>     path ???<object#635248>
>>     uid 11258
>>     gid 10513
>>     atime Thu May 2 17:31:26 2013
>>     mtime Thu May 2 17:31:26 2013
>>     ctime Thu May 2 17:31:26 2013
>>     crtime Thu May 2 17:13:58 2013
>>     gen 1197180
>>     mode 100600
>>     size 52
>>     parent 635247
>>     links 1
>>     pflags 40800000005
>>     Indirect blocks:
>>     0 L0 3:a9da05a000:2000 200L/200P F=1 B=1197391/1197391
>>
>>     segment [0000000000000000, 0000000000000200) size 512
>>
>> The application that writes to this volume runs on a windows client, so
>> far, it has exhibited identical behavior across two zfs servers, but not
>> on a generic windows server 2003 network share.
>>
>> The question is, what is happening to the data. Is it a samba issue? Is
>> it ZFS? I've enabled the samba full_audit module to track file
>> deletions, so I should have more information on that side.
>>
>> If anyone has seen similar behavior please let me know
>>
>> Mike C
>



[-- Attachment #2 --]
0	*H
010	+0	*H
"00e3v=0
	*H
0K10
URootCA10U

Bay Photo Lab10U
California10	UUS0
121023173218Z
271023173218Z0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUS0"0
	*H
0
;TąuyK~Zz2M'4
EiTj)yL5"kv7Urn \!SgP;zh>ˊj\VovX<LgfxxkL1CdY\S;z(5TO[)5bu\mBj*
nUh&`Qί;ZxȜF
ԧ@})8}4#dzw&P^=AdT}*4 qS^E)̈cA$XDS]Z/_5M`~ӻRo'Ftw\e.G.3@m"\,c{'Gidv(TQY9zbpˆ9c#Y³Vs|If	ew7I%Grau07hf.;{Jʾx/R1.LT}Կ!kb
o8H	]=}SΈ퉃00U-rfbb,v0U00U#0FNqi$x'{(W+0U00}{http://bayca.bayhoto.local/ejbca/publicweb/webdist/certdist?cmd=crl&issuer=CN=RootCA,O=Bay%20Photo%20Lab,ST=California,C=US0U0
	*H
JMUZ>7gm[z }/.~^J;өƉ-Q_\Όh޲#ԾXL7ph(@`+8W&ib!Qj+ȡ1iT(#^( giZ9c<R꼓e.ݘVѬ峿ۅ8Dh$~mm啠~'\ET&	 a}rMKL0u%HYL
l=`Υ3k[؝Y}$ ss8?~IXKda<==mL[RҠsHBR/*`JfUzA)'0JkArvp#e-{]U
Z`#2Ϡv~.#l7"D=&t^-Q_9Mi
uԒn{Zn!U%r3J;Q׼Di@PNg]&;yw|9B*.L=Ij-)/]'g^U0#0b=0
	*H
0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUS0
121023180003Z
141023180003Z0`10
	&,d1306910UMike Carlson10	UIT10U

Bay Photo Lab10	UUS0"0
	*H
0
<ȼ^|=e9KtФ-jI_	%[߲'O%3;=*n((RT	•͐C/\WU@HCjrIU-iE˼|paҨm-4݈amƵbK$"UEkEzd
w.
wG u:B'9!?tdk%%̞N.8C1ަί[
BjF0){C9&pXnĉZuX")3zsS\\D:L׏1Q}1Gzz(d#V3fRoш^CLfQ@S/StX
d5Y3M0ՙQ5ō;pIdV]&d#26zsgM}r#iМ|3)md:}뚁00R+F0D0B+06http://bayca.bayhoto.local/ejbca/publicweb/status/ocsp0U(}awJ״(#0U00U#0-rfbb,v0U00U%0
+0U0mike@bayphoto.com0
	*H
9|&V,*Hd	ƏA~6fFg'^y
I'yy,v}Z	@ᔘ7\F5QA37*LT4VStTe .Dӧ=n}=L\E	{
z7kYs#RO}E`OnL'1M0`Dۋ
rvVuX?s=	+O0:yE?BA̡5|Ʀpp*<FLA36k덝j9b=&)KJSmʐXo@g;V4@ujkX9	@Wh#nl\Y)A
rFGjqtvhu.ճK)L}@41AKz&ȴztÈ6͢j=0*+@;xnc-
WƣLG9X)=
y%]Q@BW
,Άut00MiC0
	*H
0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUS0
121023175745Z
141023175745Z0`10
	&,d1306910UMike Carlson10	UIT10U

Bay Photo Lab10	UUS0"0
	*H
0
@vɌAļVAW5:eh$n>b%k7Pwޡ=^CBv2ULLqn6+>A:P#=ѕ[8Z<|&wb(x椉
iҒx9H?~Ɔ-y]jN崡1geAˇwH4w?h!/^Pؕfa5-+%<*/+`ZBCƀno|6'zoe!)@H藱$zѩ+
SXDz(~Bݬe?V
\j;.P,銉[JݦkjY*nȡ5]
hlkz3.Wme/tɧ#	8L%
Ũ%zp	_p)ڜ(C=MYe3S>Tfρ=@	]ڑav&0ۗ;.j'Yk_00R+F0D0B+06http://bayca.bayhoto.local/ejbca/publicweb/status/ocsp0UFO+Rdb`?60U00U#0-rfbb,v0U00http://bayca.bayhoto.local/ejbca/publicweb/webdist/certdist?cmd=crl&issuer=CN=Bay%20Photo%20People%20CA,O=Bay%20Photo%20Lab,ST=California,C=US0U0U%0++0U0mike@bayphoto.com0
	*H
/ungfsy@KLw.cM&6?-Y4++IJYD	C£S_2$eڏPU((̖S~aM0ri~jk2Ւ[n9rn&Bz(MݼIܪ*ȱImu5lr[Q`3͈;l{Z07h$>at)qo\]pJW7*[c%

y1FB)p2͞[~=?!Wd9XY5.bOKUDV[Z98E
^X9n<Hi@C?H+jlۗc݌&yqQ<Ii/
ɣ*B!f<.Re-=Y*?-4;|vj1@+Iܑ=J7%'jMmrSM@GV|:C'ݮ_Lkt61F0B0d0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUSMiC0	+0	*H
	1	*H
0	*H
	1
130504000332Z0#	*H
	1u{12
0l	*H
	1_0]0	`He*0	`He0
*H
0*H
0
*H
@0+0
*H
(0s	+71f0d0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUSb=0u*H
	1fd0X10UBay Photo People CA10U

Bay Photo Lab10U
California10	UUSb=0
	*H
*_PcTH-/9:+{X1'Jۻ{xjN[Zla"?w ߥY7Z8q7XJD8mX6Z	Hyxr{*G$ED=BS
ߕ ]z

{+q=kQp Ys,oHX=OX>fv8	!vgz5qc7O&mKFGhcvF*vT%	45V(YL-_OlNg)2"Kz+wxtƚłuΪk@,'m^{u
巕:yiÂJQd,)r20SVi^@J&R?&Ul[Oc[{dqNZGPU P;d7X.@VÏ{!XeY,/=0'_l!߬xAdD\q
8n|_("

Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?51845054.3020302>