The option --minimal-snapshot-download-speed is useless in 1.16.16

[lcgogo]

solana-validator --version
solana-validator 1.16.16 (src:ec1115e8; feat:4033350765, client:SolanaLabs)

when I use option --minimal-snapshot-download-speed 52428800 but the solana log shows much less then the speed I given

[2023-10-08T10:39:38.255657968Z INFO  solana_download_utils] downloaded 176266352 bytes 0.4% 17721576.0 bytes/s
[2023-10-08T10:39:44.277170136Z INFO  solana_download_utils] downloaded 282690720 bytes 0.6% 17674024.0 bytes/s
[2023-10-08T10:39:50.299280043Z INFO  solana_download_utils] downloaded 389152504 bytes 0.8% 17678486.0 bytes/s

[steviez]

The logs you provided are not enough to determine what is happening; there are several items that come into play when attempting download:

solana/validator/src/bootstrap.rs

Lines 1261 to 1298 in 1f7c714

	debug!("Download progress: {download_progress:?}");
	if download_progress.last_throughput < minimal_snapshot_download_speed
	&& download_progress.notification_count <= 1
	&& download_progress.percentage_done <= 2_f32
	&& download_progress.estimated_remaining_time > 60_f32
	&& *download_abort_count < maximum_snapshot_download_abort
	{
	if let Some(ref known_validators) = validator_config.known_validators {
	if known_validators.contains(rpc_contact_info.pubkey())
	&& known_validators.len() == 1
	&& bootstrap_config.only_known_rpc
	{
	warn!(
	"The snapshot download is too slow, throughput: {} < min speed {} \
	bytes/sec, but will NOT abort and try a different node as it is the \
	only known validator and the --only-known-rpc flag is set. \
	Abort count: {}, Progress detail: {:?}",
	download_progress.last_throughput,
	minimal_snapshot_download_speed,
	download_abort_count,
	download_progress,
	);
	return true; // Do not abort download from the one-and-only known validator
	}
	}
	warn!(
	"The snapshot download is too slow, throughput: {} < min speed {} \
	bytes/sec, will abort and try a different node. \
	Abort count: {}, Progress detail: {:?}",
	download_progress.last_throughput,
	minimal_snapshot_download_speed,
	download_abort_count,
	download_progress,
	);
	*download_abort_count += 1;
	false
	} else {
	true

For example, you might have already aborted several times from downloads being too slow, or you may have known validators configured such that the node you are downloading from is your ONLY option.

I'm guessing you don't have the logs around to look into this (unless you've observed the issue recently). We'd need logs and your validator startup args in order to look into it. I'll leave it open for a few days, but I'm inclined to think there was something else coming into play in your case.