bean_sprout

Compress SSD Drive - Taxiing Smooth

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I have an PCIE NVME SSD 512gig drive.  It is roughly 1/2 full with about 219gig free with P3D42 and a full-up suite of ORBX NA scenery.  One day as experiment I turned on compression in the drive properties - it took about 20 minutes.

While the free space remained at 219gig I noticed that ground handling was much smoother at my ORBX airports using CYBD and L05 as examples.

I didn't connect the improved ground handling to having drive compression enabled until I turned compression off.  When I turned compression back on the smoothness returned.

Can anyone reason why enabling drive compression on my SSD has a beneficial effect?

 

Regards
bs

 

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What do you mean with "ground handling" ?

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Taxiing would have a stutter every few seconds.

Cheers
bs

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i give it a try, eventhough i have  a m2 samsung 960 EVO with 1 TB.

I hope my 7900 X @ 4,8 ghz is capable enough :)

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I have since turned compression back off.  Also turning the indexing OFF seems to help.

Cheers
bs

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23 hours ago, bean_sprout said:

Can anyone reason why enabling drive compression on my SSD has a beneficial effect?

Maybe just having a more free space? I don't really know, but i find it interesting. How much free space we are talking about - before and after compression on?

A long time ago, it was a good idea to have 50% free of your HDD. Now, with SSD's, i'm not sure. But more free space should improve performance, maybe not so significant with SSD, i have no a idea

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2 hours ago, lodestar said:

Maybe just having a more free space? I don't really know, but i find it interesting. How much free space we are talking about - before and after compression on?

A long time ago, it was a good idea to have 50% free of your HDD. Now, with SSD's, i'm not sure. But more free space should improve performance, maybe not so significant with SSD, i have no a idea

Yes in the old days.  With P3D think tons of files needing work by the OS.  Compression may work in certain configs so it depends on the bottlekneck.

The indexing contents OFF makes sense since it is added workload for the OS - longer latency.  Good on a business machine maybe.

bs 

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1 hour ago, bean_sprout said:

Compression may work in certain configs so it depends on the bottlekneck.

i'm not sure i understand this, what do you mean under the "bottlekneck"?

I disabled a lot of services in the last couple of days, i'm still in a process on informing about them and then disabling if not important. I'm seeing an improvement already. Did you know you can disable chrome services when not in use? :happy: It saves a RAM, and with all other services disabled and / or set to manual, it's makes the difference

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Posted (edited)
29 minutes ago, lodestar said:

i'm not sure i understand this, what do you mean under the "bottlekneck"?

I disabled a lot of services in the last couple of days, i'm still in a process on informing about them and then disabling if not important. I'm seeing an improvement already. Did you know you can disable chrome services when not in use? :happy: It saves a RAM, and with all other services disabled and / or set to manual, it's makes the difference

process lasso does all that for you automatically in game mode and has smart trimm to save RAM...and I think its free although I have the paid version

Edited by zmak

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12 minutes ago, zmak said:

process lasso does all that for you. Automatically in game mode and has smart trimm to save RAM...and I think its free although I have the paid version

I got the payware version, it was a special offer, but i never tried it. I may try it now, since i'm a "process kill" oriented this days :laugh:

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2 minutes ago, lodestar said:

I got the payware version, it was a special offer, but i never tried it. I may try it now, since i'm a "process kill" oriented this days :laugh:

Works right out of the box, I just enabled smart trim . Its amazing to see how it selects a few programs to be active  and scales everything else right back  even when your not in gaming mode

 

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ok, i'll try it

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i also have the pay version. will also give it a Chance.

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Hi folks, I can tell you: this Data-Compression thing is not useless

I'm operating P3D v4 on a Crucial 500GB SSD (see here , if interested).

  • Before compression I had 227 GB of disk space occupied.
  • After compression there was 163 GB of disk space assigned.

....which means a reduction of 64 GB and a gain of 64 GB more storage on my SSD (which is really notable).

Till now I haven't recognized any gain or loss of performance during flight sim operations, but at least write amplification should be reduced which can increase the endurance of a SSD significant (not to mention about free disk space - SSD are expensive and P3D inkl. all its addons needs a lot of memory location).

 

Resume: Nothing speaks against data compression; positve aspects prevail.

Guys, what are your own experiences?

Best regards to all of you,

Konrad

 

 

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To me, other than saving space there is no benefit. Other than extreme situations, the amount of disk space available has little effect on performance. Considering that every disk read during flight ( and there are MANY) needs to be decompressed and every write needs to be compressed - this takes CPU cycles. Probably negligible with today's processors but still additional overhead.

I do NOT know but I suspect that compression might shorten the life of an SSD - again I am assuming here that the technology increases disk writes - I may be wrong on that.

Vic

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There would be less data to load over the life of the flight with the added decompress time as a factor but that would be done in memory.  That could lead to better performance but there are many factors.  If your drive loads like a banshee now there may not be a big difference.

Still give it a try on your system.

 

Cheers
bs 

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