Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I need to store a LOT of small files around 40K each.

In order to circumvent filesystem limits regarding the number of files, and keeping it all manageable and backup-able I decided to use a solution with a set of tied DB_File hashes as a kind of pseudo-filesystem, each file holding thousands of small recordsets/the files.
Currently I use 16 hashes, round-robin storing files into these buckets. But with about 100,000 files stored into the set of 16 50MB files, I get speed issues. (DB_File seems practical only for about 5,000 records after all, getting slower data insert times on growing files, under good conditions 0.04 seconds each and up).

Does anyone know about a fast perl solution, a module or a producedure to manage 1,000,000+ files in a relatively small set of data-buckets? Or is the large quantity of files no problem when I sort them away in enough subdirectories (am I fighting demons here..)?
I would use a solid file structure, like a .gz, but I need to be able to delete single files from the archive and re-allocate free'd space...

Another thought:
Tests show: 0.04 seconds per insert seems to be the barrier imposed by the filesystem for writing to disk. Same as writing a ~40K file. Larger files seem to write quicker (~200K in 0.02sec). Does this ring a bell for someone and point to a solution?

In reply to Perl solution for storage of large number of small files by isync

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (4)
As of 2022-08-08 07:27 GMT
Find Nodes?
    Voting Booth?

    No recent polls found