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15

The FileZilla uses a PuTTY/psftp source code for an SFTP implementation. Actually the FileZilla runs a hidden PSFTP sub-process. But it uses its own build of PSFTP (FzSFtp.exe) that employs few optimizations (and other modifications), including: SFTP transfer queue is 4 MB (comparing to 1 MB in PSFTP) Allocates memory in much larger chunks (32 KB ...


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It appears that the Virtual Connect Modules do not support bond mode 0 (balance-rr) in linux deployments. From HP Support: http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c02957870 Information Unsupported bonding modes in an HP Virtual Connect environment can produce packet loss and/or performance issues. Details HP Virtual Connect supports ...


3

That phrase is 100% Marketing BS.


3

Before trying to tune Apache make sure you have a proper monitoring in place so you can see how many requests Apache serves and how the system resources correlate to each other. An easy to use solution for this is munin. Next, prepare load tests with which you can put your system under load to see what effect the different tuning options have. There are ...


3

-device e1000,netdev=hostnet0 This. Switch to virtio_net before you try anything else. step two: try to play with the NIC offload settings using ethtool -K turn off TSO, LSO, LRO, see if you get different results. step three: try a different distro. Ubuntu is notorious for KVM related bugs, so switch to CentOS or even Fedora as a test.


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Open regedit.exe and navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USBSTOR find the USB device you want to change and navigate down through ..Device Parameters\Classpnp There should be a DWORD value UserRemovalPolicy a 2 represents Better Performance and a 3 stands for Quick Removal. On my machine a reboot is required, but in my ...


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KeepAlive normally makes a lot of sense, requires more memory but lowers the number of connections, CPU usage and connections overhead. MaxClients and other stuff must be tuned to your situation instead. Normally you'll want Apache to have a number of idle instances big enough to serve all of your users without having it to spawn new child processes all the ...


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When you have a problem like this, you have to: obtain all requirements (latency, bandwidth, redundancy, reliability, security, required features...) analyse the current systems. If they are none, create test environments. Understand how all components work. Understand the current and the expected load. add system monitoring (with graphs) for both ...


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I believe what you are experiencing is consistent with how SPDY works. In 'old' HTTPS, the browser will send requests to the server in a serial manner, which is what you're seeing in your first screenshot. With SPDY, however, all requests are sent simultaneously, after which the server responds with the files in the order it deems optimal. This is what ...


1

How is disk speed not related to I/O limitations? I'm totally with you on this, they are linked, especially for Hadoop - I've just finished designing a new pair of clusters and disk speed was definitely an important aspect of that.



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