*6.2. Storage Experiments*

Experiments are carried out to understand to what level the SASLedger can relieve the storage burden of a blockchain node. In Figure 6, the grey bars and red bars show the block file storage demand of HLF and SASLedger, respectively; the yellow bars indicate the disk size of the remote DB server; the green line shows the storage consumption reduction rate (10) of SASLedger compared with HLF. When the number of transactions reaches 480,000, the reduction rate of peer block file size reaches 93.3%. Since the first block file containing

the genesis block and the latest block file are kept when deleting block files in peers, the SASLedger holds storage consumption records (red bars in Figure 6) of a constant value when the number of transactions changes.

$$reduction\\_rate = \frac{HLF\\_size - SASLd\\_size}{HLF\\_size} \tag{10}$$

**Figure 6.** Storage comparison between HLF and SASLedger. The grey bars and red bars show the block file storage demand of HLF and SASLedger, respectively; the yellow bars indicate the disk size of the remote DB server; the green line shows the storage consumption reduction rate of SASLedger compared with HLF.
