Quarantine problem: Ext3 directory limit to 32000 files

[Peter Farrow]

On 09/08/2010 23:32, Jules Field wrote:
>
>
> On 09/08/2010 18:31, Desai, Jason wrote:
>>>>> Especially since this guy quarantines more than 32,000 mail per day.
>>>>> To delete "old" stuff then is making the users have less than a 
>>>>> day to
>>>>> retrieve their blocked mail. That's poor service.
>>>>>
>>>>> His own suggestion of creating hourly catalogs sounded good to me.
>>>>>
>>>> Also keep in mind that 32000 files in a directory will be less 
>>>> efficient
>>>> to work through.
>>>>
>>>> Hugo.
>>>>
>>>>
>>>>
>> Are you sure there is a limit of 32,000 files in a directory?  I 
>> think there is a limit of 32,000 subdirectories.  I'm not sure about 
>> 32,000 files though.
> The limit is actually 32,000 links to any inode. And I have hit it 
> too. It just hasn't caused me a major problem yet.
> Unfortunately counting the number of entries in a directory is a slow 
> operation (effectively equivalent to an unsorted "ls") so I don't want 
> to do it every time I write a file. Which is why I haven't addressed 
> it before.
>
> Can you think of any *fast* ways of overcoming this limit? Other 
> filesystems such as xfs handle a million or so files in a dir without 
> breaking a sweat, it's just a severe limitation of ext3 :-(
>
> Jules
>
Ext4 has double the limit of ext3,  backup the data, unmount the volume, 
reformat to ext4 copy it back,

or add extra storage and mount it at the quarantine directory formatted 
as ext4


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Peter Farrow
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