This annoyed me for a while and can’t find solution anywhere else. My DS1821+ is up-to-date, 8% storage left. 6/80T. Thought of switch issue and tried connect directly and issue still occur. So root cause of 10gbe switch is excepted. Anyone experienced similar issue and any fix? Thank you.
Just checking, but you are sure the Mac does not use WiFi? You turned WiFi off? This is easy to test by removing the Ethernet cable from the Mac and try to browse the web or access the NAS.
A NAS with 8% storage left is slow, very slow. The NAS sends notifications (if you did set that up) from 80% use. That is for a reason. Beyond that level, it becomes slow and finally stops working.
Thanks Paul, yes, I have the WiFi icon on the top menu that I turn off the Wifi all the time as for 10GBE. So the 8% storage may be the cause. Cleaning up space now and evaluate the improvement. Thanks.
I also have a DS1821+, which I have a 10 Gb Synology LAN card installed. My Mac Studio has a 10 Gb LAN port, so I just connect the two together with a CAT 6 Ethernet cable and use fixed IP on both devices. I added 2 1TB NVME SSDs to give a Read/Write cache and set the BTREE file structure to stay resident in the cache. Made a huge difference.
Having 8% free space is crippling you need at LEAST 10%, but 15 to 20% should be a good guideline, as the DSM needs space to “breath”. I suggest that you clear out Snapshots and Recycle Bins, and then see if you had any files that can be deleted. Failing that, consider swapping out the drives to bigger ones. I am going through this exercise myself, but it takes a huge amount of time. Took a full week, per drive swap, and you have to do it 1 at a time.
Thanks for comments. I tried to connect Mac directly to NAS on 10GBE connection. Speed is about the same and slow symptoms still occurred. I hope to connect them directly but my NAS is far away from Mac so switch only. Free space should be the main issue while I am cleaning up space to 15% now. Speed seems more stable now.
Talking about SSD cache, As Will mentioned that Read/Write SSD cache can be risky. I was thinking to try this but write cache without RAID basis worry me a bit. Do you find that much better to do Read/Write cache? Thanks.
Why connect directly if you have a 10GbE switch? A direct connection is not faster.
Whether a Read cache or a Read/Write cache is best depends on the needs you have. You could start with a single NVMe SSD and configure it as a Read cache. If that gives a significant improvement in read speed, consider adding a second module to configure a Read/Write cache. Or you use the cache advisor in Storage Manager to assess whether caching would help.
Re SSD Cache: - yes, there is a very small additional risk, but I’ve had zero issues and I accept the risk. If my NAS should suffer a powerloss, I will see it as it is next to my desk, and then re copy the files after power is restored. You can also fit a UPS and power protected SSD sticks, or just use Read only cache, if worried about the situation.
I have found the biggest single observable improvement in navigating the folder tree. WAY faster than before.
The direct connect is for trouble shooting to see if slow speed is caused by 10GBE Switch and those had been nailed down not the case. Everything on network through Switch.
Thank you, that makes sense.