I understand in ipfs all peers caches parts of my uploaded file. Is it true even if i dont share my file with anyone(node)? I uploaded and immediately deleted a file but the file is still visible with the link.
Does all my connected ipfs peers cache files whenever i uploads a new file?
If you added a file to IPFS, and you want it removed, you need:
No one other nodes to have the file pinned
File unpinned from your own node
File removed from your MFS (if it was added)
Garbage collected (ipfs repo gc)
When all the above is true, the file is gone.
Related
I figured out pinned data is cached in blocks folder. Can I just get away with copying the files I need in blocks folder to backup? Is datastore folder generated automatically by ipfs daemon?
I tried copying only the blocks folder to another ipfs deamon and it recognized the .data files as pinned files and created a different datastore folder.
There are three stores used by Kubo (formerly go-ipfs):
Key store storing private/public keys for PeerID and IPNS
Data store
Block store
These have folders in the .ipfs directory used by Kubo (with default configuration which uses leveldb for data store and flatfs for blockstore).
datastore folder: used by leveldb to store things like pins and MFS roots
blocks folder where blocks are stored. This includes non-pinned blocks that are cached by your node.
You could copy the blocks folder to another IPFS daemon with the same configuration. However, I'd be aware that it may not be the best way to do this, especially if the node is running and modifying the blocks folder.
A much more explicit way would be to use the ipfs dag export <CID> command to export .car files.
.car files are convenient because they can be imported into another IPFS node and contain inside all the blocks.
I have hash of ipfs file, node with this file not work. But I need some how restore this file.
Can I some how restore file from hash?
You can download data from IPFS as long as there is at least one node providing it.
If the data was only at one node, and you shut it down, you won't be able to get the data until the node gets online again or someone else with the same data adds it to IPFS and announces it to DHT.
To get a list of nodes providing data for specific hash:
ipfs dht findprovs QmbWqxBEKC3P8tqsKc98xmWNzrzDtRLMiMPL8wBuTGsMnR
If you want to download data from IPFS but can't run local node try downloading it from one of public gateways.
I can download a file with ipfs get hash but does that seed the file too? It also downloads a copy of the file and saves it to the folder I run the command from which I don't want. I only want the file to be chopped up and seeded from .ipfs
Any files accessed through your gateway will be cached and available (seeding) to the rest of the p2p network as long as your daemon is running and publicly accessible.
You can run ipfs repo gc to clear your cache.
You may also add files to your local storage that won't be garbage collected. You can do this with ipfs pin {hash}, and you can view the pinned items with ipfs pin ls.
I uploaded a pdf file to the IPFS de-centralised network. My question here. When I have the IPFS console and I couldn't view the pdf file anymore through the https://ipfs.io/gateway. Why is that? My understanding is once the file is uploaded to the IPFS network and the file will be distributed to the nodes.
Adding a file to IPFS via ipfs add <file> does not distribute it to the network (that would be free hosting!), it only puts the file into the standard format (IPLD) and makes it possible to access over the network (IPFS) as long as someone connected to the network has the file. When you first add something, that's only you. So if you close your laptop, suddenly the file is no longer available. UNLESS someone else has downloaded it since then, because then they can distribute it while your computer is off. There are many "pinning services" which do just that, for a small fee.
Hi Your understanding is correct,But can you tell me how are you uploading files to ipfs network there are number of ways to add data to ipfs network,
if you are able to add data to ipfs you will get the hash of the data, condition is daemon is running locally so that your data can be broadcasted to other peers you are attached to, you can check it by command: ipfs swarm peers
if above conditions are fulfilled you view/get data from https://ipfs.io/ipfs/<replace with hash you will get after adding>
if daemon is not running you can able to add you file and get the hash but you files will be saved locally, you wont be able to access it from web.
please let me know if you need other information
How to avoid file download, if the file is already present in my local.
My Code:
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a href="file:///C:/Users/t_smrithik/Desktop/DNS.cap">DNS.cap
I do not want to download this file again. I just want to open it. The file gets downloaded to a temp folder and then the Wireshark app(app used to open cap files) loads it.
Javascript cannot access the filesystem and check for existence. The only interaction with the filesystem is with loading js files and images (png/gif/etc).
Javascript is not the task for this