I am new to Isar (and embedded software development too). I have gone through the documentation and have had some success running through the samples, generating images and booting them in qemu and vmware. I still have to dig deeper into how it all works, but overall I like the layered/modular approach and the build performance.<div><br></div><div>I am trying to figure out if it would fit our requirements which at a high level are:<div><br></div><div>1. Debian based OS for our intel based appliances.</div><div>2. Preferably read-only file system to prevent accidental installation of software and modifications. Configuration is modifiable and hence would need to be read-write.&nbsp;</div><div>3. Preferably atomic image based upgrades so that we can keep OS+app+dependencies in sync. A failed upgrade should go back to the last working version.</div><div><br></div><div>What is the recommended upgrade mechanism for Isar? Are image based upgrades possible? Where can I find samples or documentation regarding this.</div><div><br></div><div>Is read-only file system an option? Any pointers?</div><div><br></div><div>Thanks in advance.</div><div>- venu</div></div>