I run at least two tests to make sure most of the testing server can get the JPG file from the cache of the Edge server(CDN), not back to the origin server.
Azure CDN: Standard Microsoft Tier
Standard Microsoft Tier CDN
The results are base on the 14 tests from different locations globally. I care about the TTFB much more than others.
What is TTFB
TTFB, which stands for time to first byte, is the amount of time it takes from when a client makes an HTTP request to it receiving its first byte of data from the web server. TTFB is an important aspect of website optimization since the faster the TTFB, the faster the requested resource can start being delivered to the browser.
The time to first byte is made up of three separate components.
The time needed to send the HTTP request
The time needed for the server to process the request
The time needed for the server to send back the first byte of the response to the client
What is a good TTFB?
The time to first byte can vary greatly depending on what sort of content you are serving (static vs dynamic), your server’s configuration, etc. Therefore determining what is a good TTFB number is difficult to answer and is variable based on your situation. However, on average anything with a TTFB under 100 ms is fantastic. Anything between 200-500 ms is standard, between 500 ms – 1 s is less than ideal and anything greater than 1 s should likely be investigated further.
As mentioned, it should be noted that these times are average benchmarks, however do not apply to all websites. Depending on the type of content and complexity of the application it may be completely unavoidable that the TTFB is greater than 1 second
Saw a new type of disk format, exFAT. I am only knowing FAT, FAT32, NTFS, and some others for Linux operation system.
Today, when I try to format a microSD card, it has a new option, exFAT.
What is exFAT?
File size limit is now 16 exabytes.
Format size limits and files per directory limits are practically eliminated.
Like HPFS, exFAT uses free space bitmaps to reduce fragmentation and free space allocation/detection issues.
Like HTFS, permission systems should be able to be attached through an access control list (ACL). It is unclear if or when Vista will include this feature, however.
Interestingly enough, exFAT is not used and was not designed for formatting hard drives. It is only recommended in flash memory storage and other external devices only. This is why it is currently not considered a huge competitor to NTFS on hard drives.
For me, I know that flash drive capacity is getting bigger and bigger. And also the file size, I mean the video file size is also getting bigger and bigger.
FAT32 has a limitation of 4GB file size limit.
NTFS and exFAt can store a single file with 5Gb or evern more.
Microsoft has announced the Windows XP end of support date of April 8, 2014. After this date, Windows XP will no longer be a supported operating system*. To help organizations complete their migrations, Microsoft will continue to provide updates to our antimalware signatures and engine for Windows XP users through July 14, 2015.
I have an Windows 2000 sp4 in office. I tried to update it, but always get Update error: 0xC80001FE.
I do a lot of search to find the way to fix it. You know, the security issue is the most important problem of Windows. Especially for this almost 10 years old Operation System.
OK, the good answer is I got the solution for Update error: 0xC80001FE.
Let me note it here.
Right now, Microsoft released its free security program, Microsoft Security Essential. It can not work on Windows 2000.
Operating System Requirement: Genuine Windows XP (Service Pack 2 or Service Pack 3); Windows Vista (Gold, Service Pack 1, or Service Pack 2); Windows 7
Let’s see what he said about it:
Microsoft Security Essentials provides real-time protection for your home PC that guards against viruses, spyware, and other malicious software.
I am not very sure how good it is. You would better try it yourself and leave your comment to tell others how it works.
You can get it free here.