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Oct
30
comment Enabling WiredTiger engine in MongoDB 3
There is clearly storage.engine as well, which does what you want.
Oct
12
comment nginx high-availability with corosync and pacemaker
Do you really need to start the nginx? Having it running all the time probably won't consume too much memory and you don't run the risk of it not starting, when needed.
Sep
29
comment Stress Test on Wi-Fi Acess Point
Are you planning to use just one AP for 1000 iPads? :-O What hardware are you using?
Sep
29
comment How stable and reliable is HAMMER in 2015?
@MichaelHampton I know of DFBSD and HAMMER (and deem it quite interesting piece of technology) and would probably assume others have at least heard as well ... Unfortunatelly never run it in production myself, so I'm sorry OP, can't help.
Sep
24
comment How many network switches can I daisy chain together
@msoultan Actually, I'm not frowning. I think you'll do fine with what you have. But as it's rather uncommon setup, so your mileage may vary. If you run into any weirdness, adding fiber or two may help a great way (reducing number of hops from 20 to 3 or 4 should help a lot).
Sep
24
comment Server performance abysmal, should mysql have many instances running?
Your MySQL is using about 211MiB out of 2GiB. There is nothing wrong with that.
Sep
23
comment openvpn bandwidth and ping fluctuations
Do you use TCP to transport OpenVPN procol?
Sep
16
comment KVM hypervisor swap
I'd stick to the golden rule of sysadmin - "If it ain't broken, don't fix it."; There are many guides and suggestions on how to best find the size of swap. Non of them universal enough in my opinion. And if the setup is working, there is no reason to change. You can always shrink it and if you reserve some extra space, you can grow as well if need be (I doubt).
Sep
11
comment MySQL proxy or Master-Master replication?
If you need the redundancy part out of this solution, then the proxy is no option at all. It provides none ...
Sep
10
comment Transfer 15TB of tiny files
@PeterCordes that is why I recommend being careful. Myself being rather fan of bleeding edge, I quite understand why some people like long term support distros, which tend to stick to an older kernel. So sure, btrfs is maturing at a pretty good pace, but it's not an universal answer. Sure not without buts.
Sep
10
comment Transfer 15TB of tiny files
It's a little offtopic, but: @PeterCordes I'd be very careful recommending btrfs for production use, yet. Lately I had some data corruption issues related to btrfs and bcache on Ubuntu 14.04.
Sep
10
comment Transfer 15TB of tiny files
Find (or build) a statically-linked rsync binary and just run it from your home. Hopefully that won't ruin no warranty.
Aug
18
comment incremental backup IMG files - Linux
It is exactly what rsync does (copies only changed parts of file), but to do that, it has to read and checksum the whole file on both sides. So disk i/o is the same, but network traffic is less.
Aug
17
comment incremental backup IMG files - Linux
What was not working for you in the solutions ruled out? It seems that rsync would be the best bet for you...
Aug
17
comment Recommended 3x SSD Raid for mysql database
Do your benchmarks. Without knowing your database and your workload, we can hardly guess what is going to work best for you.
Aug
16
comment Blocking ddos string with iptables
Be careful. If you keep receiving such packets, but they don't harm the machine itself in any way, adding payload inspection might actually increase the load of your machine. As @lain notes, you won't free the line this way. Your command should work, but it can probably be rather easily evaded by the attacker. Adding multiple inspections like this will have even bigger performance attack.
Aug
15
comment Apache - drawback to high number of httpd processes always running
Did you serve 1000 requests in parallel, or just spawned the processes? Are you using mod_php or something similar?
Aug
15
comment Spreading a table's partitions across drives
I kind of don't understand what difference between the two you expect. (Besides some performance)
Aug
4
comment Networks can't see each other - 2 Routers - 2 Vlans
Your diagram suggests that your phones are connected directly to your computers. I presume that is incorrect. Maybe you would like to update your image (try wiring diagram)? Are your switches connected? (What you need is basically a router connected to both VLANs; EdgeMAX should do the trick.).
Aug
3
comment Logstash/elasticsearch stops accepting new data
Take a look into elasticsearch logs ... there might be something to help.