Os Error Too Many Links
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an "out of disk space" error message which showed up in one of our applications while trying to send an email. I knew right away the source of the problem and while the short term solution was easy (I renamed the problem directory
Mkdir Too Many Links
and created a new one - these files were only for logging) we definitely needed a long too many links linux term solution. All I found in the logs were a bunch of "Too many links" error messages and didn't know exactly what it could mean. Hey, cp: cannot create directory too many links I'm a programer, not a systems admin; this was a new one for me. I could see we hadn't run out of disk space but I knew "links" had to do with the filesystem. So what is "Too many links" and how do
Docker Too Many Links
we fix it? There was still plenty of disk space but the system was refusing to create a new subdirectory. As it turns out, there's a limit on these. We had recently added logging of every outgoing email. This creates an entry in the database with some details plus we store the body and any attachments on the disk. For each database log entry there is a corresponding directory to hold the email body and attachments. This was going fine till we hit 31,998 log entries (and
Ext4 Max Subdirectories
therefore 31,998 subdirectories). On an ext3 file-system 31,998 subdirectories is the limit. Each subdirectory is considered a "link" by the system and this is where we get the somewhat cryptic "too many links" message. By the way, there is technically a limit of 32,000 subdirectories but each directory always includes two links - one to reference itself and another to reference the parent directory - that leaves us with 31,998 to work with. You can easily find the number of subdirectories with one of these bash commands: # If you're in the directory to explore ls -d */ | wc -l # If not ls -d your/path/*/ | wc -l Now that I knew the problem, I had to find a solution. Ryan Rampersad has a good solution there which involves hashing the file name, but I wanted to be able to find the files easily (as a human) without having to hash a value. Also, I wanted to apply this to the three other logs we're writing to disk in a similar manner (and any others we may add in the future). Each of these log systems utilizes primary keys. This means I could use that unique integer in the place of Ryan's hash - making it easier to navigate while having no chance of a collision. There were many ways I could have divided up the groups of directories I needed to get around this limit. I wanted to keep it all easy to remember and use (as a human) when necessary. In the
Sign in Pricing Blog Support Search GitHub This repository Watch 9 Star 87 Fork 10 cykl/infoqscraper Code Issues 2 checksum_type: too many links Pull requests 0 Projects 0 Wiki Pulse Graphs New issue OSError:
Ext4 Subdirectory Limit
[Errno 31] Too many links #4 Closed mortenlarsen opened this Issue Apr 9, 2013 · 5 comments too many links fastboot Projects None yet Labels bug Milestone v0.0.4 Assignees cykl 2 participants mortenlarsen commented Apr 9, 2013 Installed with pip: $ ~/.local/bin/infoqscraper -c presentation download https://blog.nexcess.net/2012/04/27/mkdir-too-many-links-what-it-is-and-how-to-fix/ latency-pitfalls Traceback (most recent call last): File "/home/user/.local/bin/infoqscraper", line 46, in sys.exit(main.main()) File "/home/user/.local/lib/python2.7/site-packages/infoqscraper/main.py", line 357, in main module.main(infoq_client, args.module_args) File "/home/user/.local/lib/python2.7/site-packages/infoqscraper/main.py", line 193, in main return command.main(infoq_client, args.command_args) File "/home/user/.local/lib/python2.7/site-packages/infoqscraper/main.py", line 297, in main builder.create_presentation(output_path=output) File "/home/user/.local/lib/python2.7/site-packages/infoqscraper/presentation.py", line 270, in create_presentation frame_pattern = self._prepare_frames(jpg_slides) File "/home/user/.local/lib/python2.7/site-packages/infoqscraper/presentation.py", line 409, in _prepare_frames os.link(slides[slide_index], os.path.join(self.tmp_dir, "frame-{0:04d}." + https://github.com/cykl/infoqscraper/issues/4 ext).format(frame)) OSError: [Errno 31] Too many links Owner cykl commented Apr 9, 2013 Thanks for the report. However I'm not able to reproduce this issue on my systems. For some reason it seems that the creation of a hard fails. Could you: describe your environment (OS, file systems etc.) Attach the output of strace -e link ~/.local/bin/infoqscraper -c presentation download latency-pitfalls Check the content of the temporary directory, /tmp/infoq*. A command like ls -lh /tmp/infoq* | cut -d' ' -f2 | egrep "[0-9]$" | sort -n | tail -n 1` will return the maximum numbers of hard links. cykl was assigned Apr 9, 2013 mortenlarsen commented Apr 9, 2013 Thank you for looking into this. Ubuntu 12.10 x86_64 (Xubuntu) Can't attach anything other than images, so I made a gist: https://gist.github.com/mortenlarsen/5348035 Output is 1 while running. After failing /tmp/infoq* does not exist. After commenting out shutil.rmtree(self.tmp_dir) and adding pass instead in prsentation.py the result is 164. After doing /tmp/infoqQhd1Y8 % ln frame-1652.jpg a the r
Perl Lists Python Lists PHP Lists Ruby Lists Tcl Lists ActiveState http://code.activestate.com/lists/python-list/188791/ Lists Lists » python-list os.rename [Errno 31] Too many links From: Richard
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Super User Questions Tags Users Badges Unanswered Ask Question _ Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Cannot mkdir: Too many links up vote 1 down vote favorite 1 I'm trying to untar several tar files. I encountered something like this tar: NCBI_SRA_Metadata_Full_20110601/SRA037312: Cannot mkdir: Too many links Is there a limit to the number of files that can exist in a directory? I checked du -i the IFree is still 51M. So it doesn't looks to me like inode is running out. debian inode share|improve this question asked Jun 17 '11 at 9:05 huggie 59921117 You've asked the wrong question. You're making a subdirectory, as the error message tells you. You should therefore be asking about limits on subdirectories within a directory, not on files. (There are limits on files. But the EMLINK error here results from a different limit on subdirectories.) –JdeBP Jun 18 '11 at 13:03 add a comment| 1 Answer 1 active oldest votes up vote 6 down vote accepted Yes, there is a limit to the number of files that can exist in a directory. That limit depends on what file system you're using though, and potentially on what options were used when you formatted the file system. By default on ext3 (and I believe ext2 as well), the limit is 32,000 files. EDIT: Further reading, as well as my own testing, suggest that the 32,000 file limit is no longer an issue in modern kernels with ext3. However, there is still a 32,000 sub-directory limit, so while JdeBP's comments are technically correct, that huggie asked, and I answered the wrong question... the gist of the answer is the same. Consider this test: $ mkdir asdf $ for x in $(seq 1 32000); do mkdir $x; done mkdir: cannot create directory `31999': Too many links mkdir: cannot create directory `3