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location Fort Lauderdale, FL
age 30
visits member for 3 years, 8 months
seen 9 hours ago

System architect & Linux admin for cloud.com (Citrix).


Sep
29
revised Effects of configuring vm.overcommit_memory
added 6 characters in body
Sep
28
comment Restricting the network access of Docker container
There are a couple pending feature requests that can help with this type of stuff. #6743 which would let you pre-create iptables rules on the host before the container is started, and #6982 which would let you add iptables rules when the container starts.
Sep
24
awarded  Autobiographer
Sep
10
awarded  Guru
Aug
29
comment Why iperf still reports 1Gbps performance when using bonding over two 1Gbps adapters?
What mode do you have it in? Have you verified that both links are being utilized (even if not fully)?
Aug
13
awarded  Popular Question
Feb
28
comment How many IOPS do I need? My workload bottleneck is storage
@Totor If you want IOPS per second at a certain block size, then you don't want IOPS, you want bandwidth (eg bytes per second), a completely different measurement.
Feb
27
awarded  Popular Question
Jan
31
awarded  Yearling
Jan
2
awarded  Revival
Oct
22
comment How to prevent MAC spoofing?
What marco said. Many embedded systems don't even have a MAC address at all. They have to spoof.
Oct
21
answered RVM not picking up /etc/gemrc
Oct
18
awarded  Enlightened
Oct
18
awarded  Nice Answer
Aug
23
comment Would a PHP application benefit from being served from a RAM drive?
@Danack You're making the assumption that the system doesn't opportunistically utilize all ram for whatever it can. Most operating systems will also use available ram for filesystem caching, IO buffers, and other things. You end up steal memory from that. In any case, you're loading things into memory for no benefit. Wasting memory is never good for performance.
Aug
23
comment Would a PHP application benefit from being served from a RAM drive?
@Danack "when combined with better solutions such as a PHP accelerator". By storing files (which are large and uncompressed) in a ramdisk you're stealing memory from more legitimate uses, such as the accelerator. The accelerator already stores a bytecode version of the code, storing the original version serves no purpose.
Jan
31
awarded  Yearling
Jan
26
awarded  Nice Answer
Dec
20
awarded  Tumbleweed
Dec
13
revised strongSwan IPsec server with AWS EC2 VPC VPN client
fix software name