text: user1833: I am performing a simulation study and am curious about the parameters of my simulated metagenome. 
  What are the library and insert sizes of some of the most "used" sequencers. Mainly, I am interested in the different Illumina platforms (MiSeq, HiSeq, HiSeqX), 454 Pyrosequencing, and Ion Torrent.
  I do not need the long read technologies like Pac-Bio's SMRT and Oxford Nanopore since they are not typically used with metagenomics, yet. 
  
  user964: Both of those depend on the application of the library.  For example whole genome assembly of a mammal would require a larger library size than targeted re-sequencing of a virus.  Also insert size varies if you are doing genome assembly a larger insert size is valuable to allow for long range linking and scaffolding.  
  I think that if you edit your question of be more specific people will be able to provided a more concrete answer other wise it is "it depends" 
  
original_text: 1833: <p>I am performing a simulation study and am curious about the parameters of my simulated metagenome. </p>
  
  <p>What are the library and insert sizes of some of the most "used" sequencers. Mainly, I am interested in the different Illumina platforms (MiSeq, HiSeq, HiSeqX), 454 Pyrosequencing, and Ion Torrent.</p>
  
  <p>I do not need the long read technologies like Pac-Bio's SMRT and Oxford Nanopore since they are not typically used with metagenomics, yet. </p>
   964: <p>Both of those depend on the application of the library.  For example whole genome assembly of a mammal would require a larger library size than targeted re-sequencing of a virus.  Also insert size varies if you are doing genome assembly a larger insert size is valuable to allow for long range linking and scaffolding.  </p>
  
  <p>I think that if you edit your question of be more specific people will be able to provided a more concrete answer other wise it is "it depends" </p>
  