Re: xfsdump max file size

[Jason Joines <joines@bus.okstate.edu>]

Mandy Kirkconnell wrote:

>
> Jason Joines wrote:
>
>> Mandy Kirkconnell wrote:
>>
>>> Jason Joines wrote:
>>>
>>>> What's the maximum file size for a file to be dumped by xfsdump? 
>>>
>>>
>>>
>>> xfsdump doesn't (really) have a maximum file size limitation.  There 
>>> is a maximum file size defined in xfsdump/dump/content.c but it is 
>>> set to the largest theoretical file size, 18 million terabytes.  The 
>>> definition is defined in bytes:
>>>
>>> /* max "unsigned long long int"
>>> */
>>> #define ULONGLONG_MAX   18446744073709551615LLU
>>>
>>> Obviously this maximum limit is impossible to hit, which is why I 
>>> say xfsdump doesn't have a max file size limit.  You should be able 
>>> to dump the biggest possible file you can create.
>>>
>>> There is, however,  a command line option (-z) to set a maximum file 
>>> size for your dump.  This option allows you to specify a maximum 
>>> file size, in kilobytes.   Files over this size will be excluded 
>>> from the dump.
>>>
>> When running a dump with "xfsdump -F -e -f 
>> /local/backup/weekly/sdb3.dmp -l 0 /dev/sdb3" I get the message, 
>> "xfsdump: WARNING: could not open regular file ino 4185158 mode 
>> 0x000081b0: File too large: not dumped".  The file in question is 5.0 
>> GB.
>>
>> Jason
>> ===========
>>
> xfsdump does not set EFBIG (errno 27) anywhere.  It looks like the 
> error is coming from the filesystem on the first attempt to open the 
> file. What version of xfs are you running?  Are you using the released 
> version of xfsdump, or have you built your own copy?
>
> Perhaps you could also use xfs_db to look at the extents of the file:
>
> # xfs_db -r /dev/sdb3
> xfs_db:  inode 4185158 p
>
> We are able to dump a file of 4.5 GB without hitting the error.  
> Perhaps we can figure out what's different between our environments 
> and go from there.
>
    Actually, I'm not quite sure what version of xfs it is.  How do I 
tell?  I am using a 2.4.18 kernel compiled by SuSE.  I installed and 
looked at the source for this kernel but couldn't find anything that 
said what version of xfs it is.  My xfsdump version is version 3.0.  It 
is from a SuSE rpm as well. 

    xfs_db gave:
# xfs_db -r /dev/sdb3
xfs_db: inode 4185158
xfs_db: p
core.magic = 0xfeff
core.mode = 0
core.version = 4
core.format = 0 (dev)
core.uid = 0
core.gid = 0
core.atime.sec = Wed Dec  6 15:33:04 1916
core.atime.nsec = -1818818560
core.mtime.sec = Mon Dec 14 15:16:30 1992
core.mtime.nsec = 1140850688
core.ctime.sec = Tue Feb  6 19:52:21 1973
core.ctime.nsec = -1674700016
core.size = -7811766231833445970
core.nblocks = 5764888998212337664
core.extsize = 201326592
core.nextents = 16777216
core.naextents = 26624
core.forkoff = 0
core.aformat = 0 (dev)
core.dmevmask = 0xf000000
core.dmstate = 28672
core.newrtbm = 0
core.prealloc = 0
core.realtime = 0
core.gen = 83886080
next_unlinked = 2483027968
u.dev = 0x6000000
xfs_db: q


Jason
===========