Quote from: satscraper on January 11, 2024, 06:44:34 PM

Quote from: lcharles123 on January 02, 2024, 01:46:15 AM

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Interesting solution for IBD, never encountered it before.

Having in mind 16 Gb RAM, what size should be assigned to RAMdisk ? And how to set up dbcache in this case, dbcache=1/4 RAMdisk or 1/4(RAM - RAMdisk).

And another question. What is gain in comparison with M.2 NVme SSD?

I assigned 10GB for dbcache, and 4GB for RAMDISK. Not needed big RAMdisk because it will store only a few blk and rev files, the rest will be links of that files to persistent storage.
There are many access to latest blk and rev files during syncronization.
The writes on chainstate are made up periodically or if you interrupt the sync, so this work will be amortized by download activity.
I said gain because generally RAM are faster than any SSD. But it depends on the machine you are using too. I do not have machines with M.2 connector to test.

I just synced the blockchain with this setup, have to reindex from 49% because the system crashed, since I am using 2x 500GB HDDs on a docking station connected though USB to notebook. The sync from scratch was going well with about 15% a day, but the reindex process was really slow, because i have put only index folder and chain state on RAMdisk, but not helped much.
The script needs some adjusts, removing set -e, because it not needed since if the script exits, the RAMdisk will be filled up and the bitcoind will stop after that.

So instead re-indexing, downloading from scratch is much more faster, and you can make checkpoints by interrupting the program at 30% for example, and saving chainstate and index folders and some of the recent blk and rev files. To put it back in the case of any critical event occurs further on the process.

Beginning of 2023 I was trying to run a full-node, but it doesn't worked because some problems with mergerfs. The initial sync long lasted about 4 months. But now with this strategy, i can conclude it in the same machine in less than one week.

Quote from: WhyFhy on January 11, 2024, 06:24:12 AM

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I wouldnt help yogg with anything if I where you.
(Yogg hasn't been around since he swept all the keys and coin from coldkey wallets from the collectibles section)
And why are you necro posting? This topic is years old now.

I searched in this forum using many terms about "speeding up initial sync" and all the time it returned this thread as the only relevant one. But it lacks a satisfactory answer, so I just give one.