swap files on usb flash, and samba questions

[tedm]

I had samba up and running, but currently it's not (have read the samba pages, but they refer to older startup file locations), (I have the latest systemd / xinetd setup on my dockstar, so am wondering if there are any downsides to the SWAT method mentioned on one of the samba pages?

Also, in the smb.conf file(s) where should I put the public share mount, if I want the whole volume "/on or /home on" and do I have to put an entry in fstab for it? What should that entry look like?

Finally, my dockstar has only 128K, and is usually only using 40-60K, but occasionally 100K. Should I setup a swap file? ( have about 7GB free on an 8GB usb flash drive, and I don't care if it wears out faster because of swap on it. I swap on ssds, and some are 4 years old, with no problems. I like that with a swap file, I don't have to use dd, and can keep the existing system in place, and swapon and swapoff.

What are good utilities to max out the memory to see what a memory crash would do?

Thanks!

[WarheadsSE]

SWAP on FLASH = NO NO NO

Place the point where you want it, but I would not grant samba access to / only /media, or YOUR personal /home.

same config file
systemctl start smbd nmbd

[tedm]

Thanks, can you clarify on the flash? If I setup a file, I can keep the file off, unless there's an emergency where I run out of physical ram, then turn on the file, and get a new USB flash drive after, knowing this one is likely degraded.

Also, on the samba, um, it's just for me, why wouldn't I want full access via samba when I don't have ssh or putty access?


$this->bbcode_second_pass_quote('WarheadsSE', 'S')WAP on FLASH = NO NO NO

Place the point where you want it, but I would not grant samba access to / only /media, or YOUR personal /home.

same config file
systemctl start smbd nmbd

[WarheadsSE]

If you make a swapfile, don't make it ridiculous, 512 is WAY more than you will probably ever need, and only turn it on when absolutely necessary.

[tedm]

Thank you. I have samba up and running, and went from about 45 to 55 processes, and 45k to 55k in use at boot, but samba is working well. Anyone have lower memory footprints with and without samba (with xinetd)? I added the fuse driver as well as SWAT, but haven't yet seen the swat interface, I don't have lynx, so is there another text browser? I don't think I have a web server running, so I'm not sure how to check out my host:901 http port? Perhaps I could save memory by removing the SWAT web config?

I guess that I'm wondering what are the risks of running such a low memory system without swap? I monitor top regularly, but wouldn't mind regular replacing a usb stick if swap would help the little server stay running longer as I do more things with it. The only thing I can think of, other than above, is to remove IPV6 which I don't need, but I haven't gone through the ~55 processes with a fine tooth comb yet either.

Do other docstar users just live with the 128K and when something doesn't run or it crashes, just reboot? Thanks for helping with these arch arm /systemd sysctrl noob questions. I appreciate it.


$this->bbcode_second_pass_quote('WarheadsSE', 'I')f you make a swapfile, don't make it ridiculous, 512 is WAY more than you will probably ever need, and only turn it on when absolutely necessary.

[hydro]

$this->bbcode_second_pass_quote('tedm', '
')Do other docstar users just live with the 128K and when something doesn't run or it crashes, just reboot? Thanks for helping with these arch arm /systemd sysctrl noob questions. I appreciate it.

[moonman]

Some things fail because by default tmp is in ram.

[tedm]

Thanks, that is helpful info. Here is my free mem:

$this->bbcode_second_pass_code('', ']# free -m
total used free shared buffers cached
Mem: 120 117 2 0 22 58
-/+ buffers/cache: 36 83
Swap: 0 0 0
[root@')

and here is a list of processes running:

PID TTY STAT TIME COMMAND
1 ? Ss 0:01 /usr/lib/systemd/systemd --system --deserialize 18
2 ? S 0:00 [kthreadd]
3 ? S 0:01 [ksoftirqd/0]
5 ? S 0:00 [kworker/u:0]
6 ? S< 0:00 [cpuset]
7 ? S< 0:00 [khelper]
8 ? S 0:00 [kdevtmpfs]
9 ? S< 0:00 [netns]
10 ? S 0:00 [sync_supers]
11 ? S 0:00 [bdi-default]
12 ? S< 0:00 [kintegrityd]
13 ? S< 0:00 [kblockd]
14 ? S< 0:00 [ata_sff]
15 ? S 0:00 [khubd]
16 ? S 0:00 [khungtaskd]
17 ? S 0:00 [kswapd0]
18 ? SN 0:00 [ksmd]
19 ? S 0:00 [fsnotify_mark]
20 ? S< 0:00 [crypto]
30 ? S< 0:00 [orion_spi]
31 ? S 0:00 [kworker/u:1]
35 ? S 0:00 [scsi_eh_0]
36 ? S 0:05 [usb-storage]
38 ? S< 0:00 [ext4-dio-unwrit]
48 ? Ss 0:00 /usr/lib/systemd/systemd-udevd
73 ? Ss 0:03 /usr/lib/systemd/systemd-journald
97 ? S 0:00 [mv_crypto]
114 ? Ss 0:00 /usr/sbin/crond -n
118 ? Ss 0:00 /usr/sbin/sshd -D
119 ? Ss 0:00 /usr/lib/systemd/systemd-logind
121 ? Ss 0:00 /usr/bin/dbus-daemon --system --address=systemd: --nofor$
122 ? Ss 0:01 /usr/sbin/syslog-ng -F
133 tty1 Ss+ 0:00 /sbin/agetty --noclear tty1 38400 linux
137 ttyS0 Ss+ 0:00 /sbin/agetty -s ttyS0 115200 38400 9600 vt102
212 ? Ss 0:00 dhcpcd -qL -t 10 eth0
219 ? S 0:00 /usr/sbin/ntpd -s
220 ? Ss 0:00 /usr/sbin/ntpd -s
342 ? S 0:01 [flush-8:0]
401 ? Ssl 0:02 /usr/bin/smbnetfs -f -o allow_other /mnt/smbnet
636 ? Ss 0:00 /usr/sbin/smbd -F
637 ? Ss 0:02 /usr/sbin/nmbd -F
639 ? S 0:00 /usr/sbin/smbd -F
901 ? S 0:03 [kworker/0:0]
3285 ? Ss 0:02 sshd: root@pts/0
3287 pts/0 Ss 0:00 -bash
3352 ? S 0:00 [kworker/0:1]
3365 pts/0 R+ 0:00 ps ax

Anyone see anything that I can remove easily to reclaim free memory?

[hydro]

The programs you are running need 36 mb RAM, so there is no need for swap. If you are worried about the "free 2" read this:
https://wiki.archlinux.org/index.php/FA ... _my_RAM.3F

[tedm]

You mean KB, right? I've since added nginx, and php, and oddly, down to 33KB in use by the free -m command, but top showing ~112/128KB used.

$this->bbcode_second_pass_quote('hydro', 'T')he programs you are running need 36 mb RAM, so there is no need for swap. If you are worried about the "free 2" read this:
https://wiki.archlinux.org/index.php/FA ... _my_RAM.3F