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How accurate is the bandwidth meter?

Discussion in 'Tomato Firmware' started by Morac, Jul 4, 2014.

  1. Morac

    Morac Network Guru Member

    I'm wondering how accurate the bandwidth meter in Tomato (Toastman) is based on observations I've had with iCloud backups. I know iCloud backup works, yet I see a huge discrepancy between what Apple is saying the size of the backup is and how many bytes tomato says was uploaded.

    For example, my iCloud backup is currently reported at 1 GB. I deleted my cloud backup and redid it. Tomato reported that 200 MB was uploaded, that's a fifth of the size. Now I supposed Apple might be compressing the files, but I know for a fact that 233 MB of the backup files are mp3 music files, which don't really compress.

    There are a lot of tiny files, a few hundred KB or less, and not many large files. Could Tomato somehow not being counting the small files?

    Another thing that makes me wonder about the accuracy is that Tomato's reported used bandwidth never matches or is close to Comcast's bandwidth meter, but I don't know how accurate Comcast's meter is. They are never more than 50% off though. Definitely not 5 times off.
  2. rs232

    rs232 Network Guru Member

    I transfer lot of data via vpn and have good control on what my backup is. I have to say it seems all right to me. My guess is that icloud uses deduplication? That means, if a file is already in the cloud (even under a different user!) you will get a hard link rather than another physical copy of the very same file.

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