There are others as I've stated. Also, what do mean by by "3rd party servers or databases"? Databases made by Microsoft? Because that's also not true. Any software vendor can write a writer that responds to VSS commands. The fact that it isn't sold by Microsoft makes no differenc
No, not by microsoft and not by any database vendor. And not all brands make writers for their servers, not at all. Examples Ahsay embedded backup server, based on BSD. I have no idea what kind of database it is. Ist Ahsay own made database. Example Palo Alto embedded VM. Check Point embedded VM operating system is GAIA. I havent hear abot any writer existence. And dont expect there isnt databases at all. Databases exist almost in every software. Even home software program can have database and you cant get information what database it is. Support can tell you - Some John Smith, or programmer write this application or server, who the hell know what kind of database this is. John itself writed it, but no writer. And with support you can exchange mails couple of months and still get nothing. Until then still no backups?
Fine, if that works for you because you're using Linux and your software vendor is crap, then great. Glad for you. But have you ever tried restoring a VM to a powered-on state and that VM runs some sort of database application? If not, let me just tell you that most of the time when you restore to this point, you have to reboot the VM anyway because it's unstable. But, as I said, if you are using some obscure software made by a vendor that won't provide proper backup methodologies including quiescing scripts, then more power to you. I wish you luck.
Of course I have done this many times successfully. Yes databases also, but they are databases in the same VM. All is restored. No, its not unstable. I had no any problems, only network sometimes dont start, but its easy to fix. No any reboot wasnt necessary at all......But not only this. Backing up through LUN, through LUN snapshot replication is many times faster than Veeam backup. Storage SAN snapshot replication is hardware specific, very fast. Its surely preferable method than using some backup software with quiescing through writers. Also when you backup in this way, you must after restore boot server. With LUN related backup you dont need boot server.
Once again, this is a problem you're having with whatever software or system vendor you're dealing with who refuse to provide any safe and reliable backup methodologies. You're blaming other vendors for not supporting a method to quiesce these types of applications/systems when the blame is on the vendor who sold it to you. You need to go to them and complain rather than to all other backup application vendors and complain. It's not their responsibility to support obscure, poorly-written apps or operating systems--especially pre-built and packaged virtual appliances.
No, its not problem. Most software vendors dont make writers. Also writers are not stable solution. Because I can change ESXi versions, vCenter versions and also server version of this vendor. All this can stop its compatibility.....And what you mean "poorly written apps". Today, the trend is to use embedded VM-s as servers. They are OVA or OVF files. There is all stuff - operating system, server, apps, configuration, all. You dont need to do anything more than run this VM and start configuring its through web. I have no any interest what operating system or writer it have. I read documentation. When in documetation is written about writer, then there is writer, when not, then I dont care more. Its normal practice. And why I must additionally write some mail to support? Why? I have nothing better to do?