Use the swift command-line client to analyze log files. The swift client is simple to use, scalable, and flexible.Use the swift client -o or -output option to get short answers to questions about logs, You can use the -o —output option with a single object download to redirect the command output to a specific file or to STDOUT (-). The ability to redirect the output to STDOUT enables you to pipe (|) data without saving it to disk first.

This example assumes that logtest directory contains the following log files: 2010-11-16-21_access.log 2010-11-16-22_access.log 2010-11-15-21_access.log 2010-11-15-22_access.log Each file uses the following line format: Nov 15 21:53:52 lucid64 proxy-server - 127.0.0.1 15/Nov/2010/22/53/52 DELETE /v1/AUTH_cd4f57824deb4248a533f2c28bf156d3/2eefc05599d44df38a7f18b0b42ffedd HTTP/1.0 204 - \ - test%3Atester%2CAUTH_tkcdab3c6296e249d7b7e2454ee57266ff - - - txaba5984c-aac7-460e-b04b-afc43f0c6571 - 0.0432 Change into the logtest directory: $ cd logtest Upload the log files into the logtest container: $ swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing upload logtest *.log 2010-11-16-21_access.log 2010-11-16-22_access.log 2010-11-15-21_access.log 2010-11-15-22_access.log Get statistics for the account: $ swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing -q stat Account: AUTH_cd4f57824deb4248a533f2c28bf156d3 Containers: 1 Objects: 4 Bytes: 5888268 Get statistics for the logtest container: $ swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing stat logtest Account: AUTH_cd4f57824deb4248a533f2c28bf156d3 Container: logtest Objects: 4 Bytes: 5864468 Read ACL: Write ACL: List all objects in the logtest container: $ swift -A http:///swift-auth.com:11000/v1.0 -U test:tester -K testing list logtest 2010-11-15-21_access.log 2010-11-15-22_access.log 2010-11-16-21_access.log 2010-11-16-22_access.log

This example uses the -o —output option and a hyphen (-) to get information about an object. Use the swift download command to download the object. On this command, stream the output to awk to break down requests by return code and the date 2200 on November 16th, 2010. Using the log line format, find the request type in column 9 and the return code in column 12. After awk processes the output, it pipes it to sort and uniq -c to sum up the number of occurrences for each request type and return code combination. Download an object: $ swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing \ download -o - logtest 2010-11-16-22_access.log | awk ‘{ print $9”-“$12}’ | sort | uniq -c 805 DELETE-204 12 DELETE-404 2 DELETE-409 723 GET-200 142 GET-204 74 GET-206 80 GET-304 34 GET-401 5 GET-403 18 GET-404 166 GET-412 2 GET-416 50 HEAD-200 17 HEAD-204 20 HEAD-401 8 HEAD-404 30 POST-202 25 POST-204 22 POST-400 6 POST-404 842 PUT-201 2 PUT-202 32 PUT-400 4 PUT-403 4 PUT-404 2 PUT-411 6 PUT-412 6 PUT-413 2 PUT-422 8 PUT-499 Discover how many PUT requests are in each log file. Use a bash for loop with awk and swift with the -o —output option and a hyphen (-) to discover how many PUT requests are in each log file. Run the swift list command to list objects in the logtest container. Then, for each item in the list, run the swift download -o - command. Pipe the output into grep to filter the PUT requests. Finally, pipe into wc -l to count the lines. $ for f in `swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing list logtest` ; \ do echo -ne “PUTS - ” ; swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing download -o - logtest $f | grep PUT | wc -l ; \ done 2010-11-15-21_access.log - PUTS - 402 2010-11-15-22_access.log - PUTS - 1091 2010-11-16-21_access.log - PUTS - 892 2010-11-16-22_access.log - PUTS - 910 List the object names that begin with a specified string. Run the swift list -p 2010-11-15 command to list objects in the logtest container that begin with the 2010-11-15 string. For each item in the list, run the swift download -o - command. Pipe the output to grep and wc. Use the echo command to display the object name. $ for f in `swift -A http://swift-auth.com:11000/v1.0 -U test:tester -K testing list -p 2010-11-15 logtest` ; \ do echo -ne “$f - PUTS - ” ; swift -A http://127.0.0.1:11000/v1.0 -U test:tester \ -K testing download -o - logtest $f | grep PUT | wc -l ; \ done 2010-11-15-21_access.log - PUTS - 402 2010-11-15-22_access.log - PUTS - 910