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19

The recommendation from the Apache project is: In general, you should only use .htaccess files when you don't have access to the main server configuration file. ... a common misconception is that user authentication and mod_rewrite directives must go in .htaccess files. So please both set AllowOverride None and all your other directives in the main ...


15

Any other possible reason in addition to distance from server? The path the packets take.


9

Assuming the graph is http request time it seems fairly reasonable to me. A http request (in the absense of keepalive, fastopen etc) normally requires at least two round trips. Client sends syn Sever receives syn and sends syn-ack Client receives syn-ack and sends ack and request. Server sends response. The speed of light in fiber is about 2*10^8 ...


5

Searching google for ping "us-mid" yields Monitis.com and their IP in Dallas, who also have a DE IP in Frankfurt. From a very well-connected server in France I have 9 ms ping RTT to the DE IP and 111 ms ping RTT to the US-MID IP. For HTTP time-to-response I'd expect double that plus the server's reaction time, for the sake of argument let's say maybe 26 and ...


2

You did not specified the vdisk cache type, so libvirt is assuming the most safest cache scheme: directsync, which imply that all writes are immediately synched to the physical disk. Such restrictive cache type is generally overkill for modern, cache-aware application, which uses write barriers by themselves to ensure important writes are synched to disk. ...


2

Comparing the number of CPUs of a mainframe image isn't meaningful, most likely. Mainframes are designed to run multiple tasks at the same time, and give priority to whatever the business says is most important, and are capable of being very heavily virtualized, so looking at the number of CPUs doesn't tell you much. You have to understand the environment ...


2

Random seek times will be roughly O(1) like uncompressed file systems as well, but with the caveat that up to 128 KiB of data is compressed together so to read just a single byte, all the data in that 128 KiB block will have to be read and decompressed. Depending on the access pattern, this can have a somewhat large performance impact, but you need to ...


2

The problem was https://developers.google.com/speed/pagespeed/module/ which have done cache clean every hour. Configuration it to store files on tmpfs fixed the problem.


1

First, it is perfectly normal that DM devices does not have any I/O scheduler, as (with specific exceptions) About the low performance you recorded, consider that your H310 controller not only has no cache, but it even disables the physical disk's DRAM cache, meaning your system has no way to lower latency via caching. Combining that with encryption, where ...


1

Scientific Method is your friend. You or someone on your behalf will have to monitor your system to gather the necessary data to allow you to make an informed decision. Your load average spikes quite sharply and at predictable times, that means it should be fairly straightforward to monitor the event with tools like top, iostat, vmstat etc and start the ...


1

Recommended disk format size in Azure for any type of disk is 64K not 4K. This is due to the network nature of how storage is delivered to the VM. Try your tests with 64K.


1

There are some limits in Azure Premium Storage that you should consider to get optimal performance. In particular as you can see here there are IOPS and Throughput limits per premium disk. And they are different for different disk types. Moreover there are some limits per VM Size. So for the best result you should choose right VM Size, disk type and number ...


1

First, this seems a common problem with DS213j and DSM 5.1+. Someone reported that after a reboot, the problem went away: have you tried it? From your top data, it seems that the CPU is busy with system time, ie: doing some syscall. Try changing the following parameters in the smb.conf file and then restart the NAS: change notify = no kernel change notify ...


1

I am installing a 48T Dell MD-1200 and I was curious about this question. The MD1200 is connected to a hardware RAID card set up as RAID-6, so it looks to Linux like just a (big) drive. I tested an XFS filesystem on an LVM physical volume vs. an XFS filesystem on a straight disk partition. I used a Dell R630 machine with two E5-2699 CPUs in it. The system ...



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