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Compare I/O

  • I/O is input/output and refers to the speed at which data is transferred to and from a hard drive;
  • The typical response from a web host to you exceeding your I/O threshold is to throttle processes;
  • The default I/O restriction set by CloudLinux is 1MB/s (see below).

Compare I/O

  • I/O is input/output and refers to the speed at which data is transferred to and from a hard drive;
  • The typical response from a web host to you exceeding your I/O threshold is to throttle processes;
  • The default I/O restriction set by CloudLinux is 1MB/s (see below).

Compare hosts

We compare 18 web hosts against 56 metrics, including monthly and annual pricing and bandwidth, CPU, read/write, storage and database restrictions.

Compare I/O

Listed below is a comparison of how the 18 web hosts we review restrict or limit I/O.

When you purchase a shared hosting account you’re purchasing hosting on a server shared by potentially hundreds or thousands of other websites.

Many web hosts now use Cloud Linux OS to democratically assign server resource to each customer. Cloud Linux allows web hosts to create what are referred to as lightweight virtualized environments (LVEs) for each customer.

LVEs compartmentalize a web server and ensure that no single user can leverage a disproportionate amount of server resources, which is a problem that has long plagued web hosts.

I/O is input/output and refers to the speed at which data is transferred from, or to, your server’s hard drive (this is typically referred to as throughput). It differs from IOPS, which refers to a limit on the total number of read/write operations that a hard drive can perform per second.

If a particular LVE reaches an I/O threshold then Cloud Linux can work to throttle that LVEs processes. This may manifest in your website running slower than it would ordinarily.

The default I/O limit set by CloudLinux is 1,024Kb/s, which is what most web hosts apply. However, web hosts like GreenGeeks and Namecheap limit I/O at 4MB/s and 6.25 MB/s (of all the web hosts we’ve reviewed Namecheap and GreenGeeks set the most lenient restrictions on I/O).

I/O restriction

The table below indicates how the web hosts we’ve reviewed restrict I/O.

N/A = Not applicable NS = Not specified RBNS = Restricted but not specified

Click on a host to read the full review.

Web hostI/O restrictionVisit
GoDaddy1MB/sVisit
Heart InternetNSVisit
1&1NSVisit
Namecheap6.5MB/sVisit
Hostinger1MB/sVisit
FatCowNSVisit
Just HostNSVisit
GreenGeeks4MB/sVisit
FasthostsNSVisit
A2 Hosting1MB/sVisit
DreamhostNSVisit
HostGatorNSVisit
InMotion Hosting2MB/sVisit
iPageNSVisit
Host Papa1MB/sVisit
BluehostNSVisit
SitegroundNSVisit

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