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The HEMI can "shut off" four cylinders when they are not in use, hence being more fuel efficient, and may even have a bit of lag to power those up for when they're needed acceleration lag, if you will. The BMW engine on the other hand, since all 8 cylinders are all active all the time, will not have said lag when accelerating Well actually the point of the benchmark is to remove the subjective element of the platform and try to approach it with a more 'scientific' bent.
Much more difficult then it seems at first blush. Which is why, if your doing FS benchmarks, it's a necessity to see the configuration and full output from the application. It's not like benchmarking a application or a game were you have the same app on both systems.
Our goal here is not to benchmark the benchmarking application, but to measure the performance of the OSes relative to one another. Lets see a little bit more into this: So, and I don't know this for absolute certainty, that Mac OS X lies to you about whether or not a 'sync' ended successfully.
But lets assume that it does. The point of 'sync' or similar system calls is that the OS does it's best to make sure that your data is written out to the disk. This is important for a number of reasons, but mostly in case something bad happens to your system.
It's a preventative measure that exists to protect your data. So if the system is lying about what it's doing in order to make you think that it's faster then it really is, then it's putting your data at higher risk of corruption.
That is unless there is some miracle of computer science that Apple figured out or whatnot. It's designed to do performance analysis of file systems and harddrives Most operating systems don't immediately write out data to your harddrive.
This is because harddrives are very very slow and memory is fast. So if you can access and write data only to main memory then that's like having a SDRAM-based harddrive to access your data. Of course if the power goes out, then that's lights out for your data; corrupted and gone forever in a few seconds.
So the idea is that it writes out a bunch of data then immediately begins to read it back in. In real-world situations that sort of behavior is pretty pathological.
It's fairly odd to write out data then immediately read in random bits of it. You may do it for a database or you may need to do it for editing videos or whatnot So what your really interested in knowing is how well does the file system deal with multi-user or multi-tasking performance, as well as application start up times, and that sort of thing.
And most of those things involve reading in stale data from the disk and file systems.
Most of those things involve using data sets larger then your main memory. I mean at some point your going to be reading data randomly from a disk. It's why you have a disk. So you want to know actually how well that performs.CONTENTS IN BRIEF. PART 1 Strategy Analysis. Strategy Highlight Threadless: Leveraging Crowdsourcing to Design Cool T-Shirts.
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This approach can work well, especially if. Benchmarking and Improving Kudu Insert Performance with YCSB. Posted 26 Apr by Todd Lipcon.
The Kudu Write-Ahead Log (WAL) is written to one of these same drives; fsync the block close the block The sync_file_range call here asynchronously enqueues the dirty pages to be written back to the disks. All sync’d to the schwenkreis.comsses can utilize modern technology they desire, includingFacebook and mobile payments, while retaining the ability to perform legacy operations they need, such as exporting reports, printing barcodes, and managing employee permissions.
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