Tiny tool for merging multiple log files. Reads stream, so should not use a lot of RAM.
Logs are merged based on parsed timestamp. You should provide -ts timestamp format that corresponds to the one in your logs.
The default is: Jan 2 15:04:05.
Please refer to time package documentation for more info. https://golang.org/pkg/time/#pkg-constants
Tested with 3x12GB log files.
Example:
File #1
Aug 1 00:13:58 Preparation is finished. Wish us good luck.
Sep 25 11:50:04 Did I tell that the weather is just great? It feels more like a vacation.
Sep 30 06:30:41 Today I saw the last seagul, looks like we are far from big land now.
File #2
Sep 8 00:13:58 We have plenty of food and drinking water.
Sep 19 00:30:24 Thanks to a strong wind we quickly move tovards new adventures.
Oct 2 14:00:42 Captain and several sailors are injured. Doctor is here, hopefully we will be able to continue.
File #3
Oct 12 04:05:42 Storm was just incredible. And we lost both anchors.
Oct 20 18:44:08 Today is my birthday, and I am afraid that it is my last birthday.
Merge should result in:
Aug 1 00:13:58 Preparation is finished. Wish us good luck.
Sep 8 00:13:58 We have plenty of food and drinking water.
Sep 19 00:30:24 Thanks to a strong wind we quickly move tovards new adventures.
Sep 25 11:50:04 Did I tell that the weather is just great? It feels more like a vacation.
Sep 30 06:30:41 Today I saw the last seagul, looks like we are far from big land now.
Oct 2 14:00:42 Captain and several sailors are injured. Doctor is here, hopefully we will be able to continue.
Oct 12 04:05:42 Storm was just incredible. And we lost both anchors.
Oct 20 18:44:08 Today is my birthday, and I am afraid that it is my last birthday.
go get github.com/cooldarkdryplace/logmerge
logmerge -i your_input_directory -o output.file -tf Jan 2 15:04:05
-i Input directory. Place where multiple files are located. All files considered to be logs.
-o Output file. Merge result.
-ts Time format of your timestamps. Example: Jan 2 15:04:05.