Linked by David Adams on Thu 20th Nov 2008 04:19 UTC
General Unix Linux and other Unix-like operating systems use the term "swap" to describe both the act of moving memory pages between RAM and disk. It is common to use a whole partition of a hard disk for swapping. However, with the 2.6 Linux kernel, swap files are just as fast as swap partitions. Now, many admins (both Windows and Linux/UNIX) follow an old rule of thumb that your swap partition should be twice the size of your main system RAM. Let us say I’ve 32GB RAM, should I set swap space to 64 GB? Is 64 GB of swap space really required? How big should your Linux / UNIX swap space be?
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RE[4]: XDMCP/NX server
by sbergman27 on Thu 20th Nov 2008 18:25 UTC in reply to "RE[3]: XDMCP/NX server"
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The only thing I would say is that works fine; as long as you wont need to scale dramatically upward, and as long as you will never expose that machine outside your firewall.

This client buys a new server every three years, about the time that the hardware support contract from the manufacturer is about to run out. Next spring, we'll have a very economical new server that will scale to 4 or 5 times the load that this one handles. Figure about 300 users. Not that we'll reach that number of users during its lifetime.

I imagine that some admins would try to overcomplicate this with multiple servers talking over the network, virtualization, and a generally buzzword compliant topology. And they would end up with a slower, more expensive, less reliable, harder to administer system. Since I semi-retired, I'm more interested than ever in systems that just work. And this config has proven itself over 6 years, 3 servers, the addition of a couple of remote offices, and a tripling of users.

Massive scaling, of a kind which requires the whole "shared nothing" approach is interesting to think about... but very unlikely to be needed.

Edited 2008-11-20 18:26 UTC

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