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8:12 AM

How file handling works with syslog-NG?

Q: Ideal file size - copytruncate - logrotate

To avoid performance issues in syslog-NG logging messages to a too large file, we would like to understand the ideal file size before rotating the file with logrotate using copytruncate and compress approach RHEL 7.x, 8GB RAM, 4 VCpu 1) Is size=200 M the ideal file size? 2) How does logrotat...

Kusalananda

8:50 AM

@overexchange Improve question formatting...

2 hours later…

Jenny D

10:22 AM

@overexchange Asking for the ideal file size is like asking for the ideal size of a house. It depends on your needs and what resources you have available.

I should suggest removing the question about ideal file size, and only keeping the part where you ask how copytruncate actually works. Otherwise your question is likely to get closed for being a matter of opinion rather than fact.

Jeff Schaller

11:05 AM

@Kusalananda sorry for the confusion regarding the bioinformatics tag in unix.stackexchange.com/questions/475426/… ; do you feel it wasa inappropriate for me to add it?

It really needs some tag wiki/excerpt help, if we want to narrow the usage

Kusalananda

11:28 AM

@JeffSchaller No, not really. I may well have over-reacted. Using Unix tools on biological data is totally ok, but DNA is structured and requires slightly more sophisticated tools for proper analysis, and I was just going a bit overboard with this.

3 hours later…

overexchange

2:28 PM

@JennyD Done

overexchange

3:00 PM

Cronjob experts... Inputs required..

Q: For rotating logs- Cronjob issue

Invoking logrotate every 15 mins. logrotate will rotate only after size threshold crosses 1M Working machine [root@machine1 output]# ls -l --block-size=1K total 296 -rw------- 1 root root 55 Oct 15 10:46 all_devices.log -rw------- 1 root root 122 Oct 15 10:00 all_devices.log-2018-10-15-1539...

linux cron logrotate

3 hours later…

Kusalananda

5:58 PM

I've been moving a data at work for a project from one server to another since Thursday. It's 6.4 TiB of data in just over 1.5 million files. Doing MD5-checksumming takes about 24 hours and the transfer took two days. Then another 24+ hours for verifying the checksums and a day to fix the permissions and ownerships. Urgh...

On the plus side, the things I actually need to do are very few. They just take loads of time. Oh, and I'm not allowed to mess up :-) So a few minutes of careful reading of shell commands makes up for potentially days of lost work (or years, if I really screw up).

overexchange

6:29 PM

@Kusalananda How to measure the msg rate at UDP port 514 on my Linux server?

port 514 is listening port

Kusalananda

@overexchange staff.fnwi.uva.nl/j.blom/gigaport/tools/man/iperf.html

iperf or something similar on Linux, I suspect would help you with that.

overexchange

yum install iperf

no such package

yum install iperf* works

Kusalananda

@overexchange Note that I know very little about Linux-specific tools for that sort of stuff.

overexchange

7:20 PM

am trying with netstat because iperf need to run client and server

I want to track performance of running port

Faheem Mitha

7:43 PM

@PrabhjotSingh For your (possible) entertainment, here is a thread about trading strategies, from that tradingqna site.

overexchange

Q: Performance of active port - netstat

Below command [root@machine1 output]# netstat -s --udp IcmpMsg: InType0: 371137 InType3: 296 InType8: 386843 InType11: 4 InType13: 141 InType15: 1 InType17: 49 InType37: 16 OutType0: 386783 OutType3: 32599 ...

linux performance netstat

William

8:01 PM

Q: tmux: Control + Shift + Tab & iTerm2

How do enable Control + Shift + Tab and Control + Tab for tmux in iTerm2 for macOS? This question may be better suited for Unix & Linux Stack Exchange or Super User, except the configuration is somewhat macOS specific. Right now I can't seem to figure out how to get the the \033[27;5;9~ send us...